The data source for this information is the U.S. Department of Energy.
The data above provides an overview of the number of air conditioning units in operation in the United States from 2010 to 2019. The total number of units in operation has shown a steady increase over the past decade, from 101.5 million in 2010 to 122.7 million in 2019. This translates to an average growth of 1.7 million units per year, or approximately 1.4% growth per year. Considering the population growth in the United States over the same time period, this growth rate can be considered moderate. The highest rate of growth was seen between 2016 and 2017, with an increase of 3.2 million units, or 2.8%. The lowest rate of growth was between 2011 and 2012, with an increase of 1.7 million units, or 1.6%. Overall, the number of air conditioning units in operation in the United States has increased steadily in the past decade, and the trend is expected to continue in the future.