to your HTML Add class="sortable" to any table you'd like to make sortable Click on the headers to sort Thanks to many, many people for contributions and suggestions. Licenced as X11: http://www.kryogenix.org/code/browser/licence.html This basically means: do what you want with it. */ var stIsIE = /*@cc_on!@*/false; sorttable = { init: function() { // quit if this function has already been called if (arguments.callee.done) return; // flag this function so we don't do the same thing twice arguments.callee.done = true; // kill the timer if (_timer) clearInterval(_timer); if (!document.createElement || !document.getElementsByTagName) return; sorttable.DATE_RE = /^(\d\d?)[\/\.-](\d\d?)[\/\.-]((\d\d)?\d\d)$/; forEach(document.getElementsByTagName('table'), function(table) { if (table.className.search(/\bsortable\b/) != -1) { sorttable.makeSortable(table); } }); }, makeSortable: function(table) { if (table.getElementsByTagName('thead').length == 0) { // table doesn't have a tHead. Since it should have, create one and // put the first table row in it. the = document.createElement('thead'); the.appendChild(table.rows[0]); table.insertBefore(the,table.firstChild); } // Safari doesn't support table.tHead, sigh if (table.tHead == null) table.tHead = table.getElementsByTagName('thead')[0]; if (table.tHead.rows.length != 1) return; // can't cope with two header rows // Sorttable v1 put rows with a class of "sortbottom" at the bottom (as // "total" rows, for example). This is B&R, since what you're supposed // to do is put them in a tfoot. So, if there are sortbottom rows, // for backwards compatibility, move them to tfoot (creating it if needed). sortbottomrows = []; for (var i=0; i
Did you ever wonder how many households there were in the United States in 1925? Or maybe you just want to project how many there will be in 2015?
If so, you've come to the right place! Our latest tool takes data collected by the U.S. Census every 10 years from 1900 through 1940, and then annually beginning in 1947 to estimate the number of households there were in the U.S in a given year.
You just need to select your year of interest in the tool below and click the "Calculate" button!
Although we've modeled the number of households in the U.S. as a function of time, in reality, it would be more proper to describe it as being a function of population, demographics and income. Time simply works as a catchall for these factors.
In building the tool however, we realized that there are two distinct periods in U.S. history where the number of households is concerned: the period up to and including 1947 and the period ever since. Our chart below illustrates those two periods:
As best as we can determine, the shift between the two periods was caused by a technological change - the introduction of mass-production techniques in U.S. home construction by William Levitt in 1947.
These technological improvements were quickly adopted by home builders across the United States, transforming the industry from a large number of local builders who might only construct three to four homes in a year, to one dominated by regional and national builders capable of constructing hundreds or even thousands of dwellings per year.
U.S. Census Bureau. Statistical Abstract of the United States: 2003. Table No. HS-12. Households by Type and Size: 1900 to 2002.
U.S. Census Bureau. Table HH-4. Households by Size: 1960 to Present. [Excel Spreadsheet]. Accessed 3 February 2013.
Labels: demographics, real estate, tool
Welcome to the blogosphere's toolchest! Here, unlike other blogs dedicated to analyzing current events, we create easy-to-use, simple tools to do the math related to them so you can get in on the action too! If you would like to learn more about these tools, or if you would like to contribute ideas to develop for this blog, please e-mail us at:
This year, we'll be experimenting with a number of apps to bring more of a current events focus to Political Calculations - we're test driving the app(s) below!
The S&P 500 at Your Fingertips
The Distribution of Income for 2010: Individuals
Should You Trade in Your Gas Guzzler?
What Are the Chances Your Marriage Will Last?
Tipping Around the World
What's Your Body Fat Percentage?
The Odds of Dying, Again!
Gas Prices, the Unemployment Rate, and Desperation
Hauser's Law
The Real Story Behind "Rising" U.S. Income Inequality
First Time Visitor to Political Calculations?
On the Moneyed Midways
A Lot, But Not All, of Our Tools
Political Calculations' U.S. GDP Temperature Gauge provides a means to quickly evaluate the growth rate of the U.S. economy against the backdrop of how the economy has performed since 1980, with the "temperature" color spectrum ranging from a recessionary "cold" (purple) through an expansionary "hot" (red).
The GDP Temperature Gauge presents both the annualized GDP growth rate as reported by the U.S. Bureau of Economic Analysis reports for a one-quarter period and also as averaged over a two quarter period, which smooths out the volatility seen in the one-quarter data and provides a better indication of the relative strength of the U.S. economy over time.
This site is primarily powered by:
Visitors since December 6, 2004:
The tools on this site are built using JavaScript. If you would like to learn more, one of the best free resources on the web is available at W3Schools.com.
ZunZun - Exceptional regression analysis tool.
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Create a Graph - Easy-to-use basic graph-making tool.
Many Eyes - Data visualization extraordinaire!
Wolfram Alpha - Computational knowledge engine.
Khan Academy - Math & science video mini-lectures!
Picasion - Animate images.
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