If you read the article it is adjusted for inflation in 2019 dollars...
https://www.heritage.org/markets-an...e-class-incomes-surging-thanks-trump-policies
The words don't fit the chart.
These numbers contrast sharply with the 16 years prior to Trump’s presidency. In the eight years that George W. Bush was president, median income barely showed any gain, up just $401 thanks to the deep recession of 2008.
In the seven and a half years that Barack Obama was president, and not including the end of the recession, which Obama inherited, incomes inched up by $1,043 (June 2009 – January 2019). This means that in the 16 years before the Trump presidency, incomes rose by about $1,500 while in less than three years middle incomes have risen three times faster.