If you look carefully at the derived numbers in that chart you will see that it has been constructed to deceive. The actual ratio of revenue to GDP is never mentioned...that is not an oversight it is intentional. Under Trump it improved by leaps and bounds and still is improving. With the changing value of the dollar due to FED RESERVE actions those numbers will change daily in fact. The Chart is only good for a few minutes ...after that it's old news.
Here is some real news that is actually relevant
Revenues jumped 18 percent in the fiscal year that just ended, analysts say — the biggest one-year increase since 1977.
www.politico.com