Here is a complete infographic that shows data on DIY home improvement expenditure from 1995 to 2009. Enjoy!
As you can see in the house graphic the data shows that rooms additions and alterations is where Americans spent the most of their DIY budget. You can check the DIY expenditure evolution timeline in the bottom chart, including a break out per project type. You can see how economic recessions affect DIY expenditure. The first recession starting in March 2001 to Nov 2001 and the second one from December 2007 to present time.
Data from 1995 to 2007 comes from The American Housing Survey, US Census, National Bureau of Economic Research and the Joint Center of Housing Studies of Harvard University. Data from 2009 is estimated.
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