The intersection between Puerto Rico and Dominican Republic is the 0.42 right above the "1" in the PR column (5th from the left).
If you imagine the full graph of all countries horizontally and vertically, there would be a lot of overlap (the PR column and DR row, and the DR column and PR row). So to save that redundancy, for all countries except Spain (very top) and Argentina (far right) you have to look around a bit to see where it crosses any other given country.
If you imagine the full graph of all countries horizontally and vertically, there would be a lot of overlap (the PR column and DR row, and the DR column and PR row). So to save that redundancy, for all countries except Spain (very top) and Argentina (far right) you have to look around a bit to see where it crosses any other given country.