Answer:
Taking into account that the inflation of the United States in the last ten years has been as follows:
2019 --- 2.29%
2018 --- 1.91%
2017 --- 2.11%
2016 --- 2.07%
2015 --- 0.73%
2014 --- 0.76%
2013 --- 1.50%
2012 --- 1.74%
2011 --- 2.96%
2010 --- 1.50%
2009 --- 2.72%
The total sum of all inflation percentages gives a total of 20.29%, which divided by 10 years gives an average inflation of 2.03%. Therefore, if I decided that a good way to make the inflation prediction for 2020 would be to use the average inflation rate over the past 10 years, inflation in 2020 would be of 2.03%.