You do need to be accurate about 2013-6 vs 2016-9
Obammunism 2013-6: 18707 / 16784 = 1.1146 = +11.5%
Trumpism 2016-9: 21427 / 18707 = 1.1454 = +14.5%
US Population 2013-6 323.1 / 316.1M = +2.21%, 2016-9 328.2M / 323.1M = +1.58%, 2013-9 +3.83%
US Inflation 2013-6 6.08%, 2016-9 6.33%, 2013-9 12.79%
US GDP growth per capita in constant 2013 dollars:
Obammunism: 54580 / 53097 = 1.0279 = +2.79%
Trumpism: 57883 / 54580 = 1.0605 = +6.05%
6.05 / 2.79 = X2.168
Trump therefore MORE THAN DOUBLED real per capita income growth over Obammunism (X 2.168)
Hope that helps.
We both made mistakes.
Obama took office in 2013. So his first three years are 2013-2015 compared against the 2012 numbers. 18219.3/16197.01 = 12.49% growth. That is what I got.
Trump took office in 2017. His first three years are 2017-2019 compared against the 2016 number. 21427.7/18707.10 = 14.5%. Unfortunately, I typo-ed one of the numbers in my calc and ended up with 25%, which is obviously wrong.
Trump STILL outperforms Obomb.