Americans spend more than $22 billion every year on air conditioning. Home owners can save money on air conditioning by replacing windows and calculating costs before purchasing air conditioners. 
http://www.csmonitor.com/Business/Saving-Money/2014/0612/Americans-spend-billions-for-air-conditioning.-How-to-spend-less-while-keeping-cool

According to US Dept. of  Energy web site:  Two-thirds of all homes in the United States have air conditioners. Air conditioners use about 5% of all the electricity produced in the United States, at an annual cost of more than $11 billion to homeowners. 

As a result, roughly 100 million tons of carbon dioxide are released into the air each year -- an average of about two tons for each home with an air conditioner. To learn more about air conditions, explore our Energy Saver 101 infographic on home cooling.
http://energy.gov/energysaver/articles/air-conditioning

Existing home sales in the USA are about 5.5 million per year.