flex your data

I downloaded some data from the USDA FAS custom query builder. The file contains the area harvested of corn in many harvest years for non-US countries. I want to calculate the % of non-US corn area that each country represents in the latest two full harvest years and then calculate the change in percentage points between those two years. The downloaded data looks like this: I’m going to use the harvest years “2017/2018” and “2018/2019”.  The first thing I’ve done is format the data as a table, by selecting anywhere in the data and pressing Ctrl+T, then I’ve given the…