The first thing that jumps out at me, actually, is the use of a shorter time period than is likely available. From 1900 or 1920 to now is a pretty short time pe

The first thing that jumps out at me, actually, is the use of a shorter time period than is likely available. From 1900 or 1920 to now is a pretty short time period. We have (some) records dating back to the mid-1700s: https://www.archives.gov/research/guide-fed-records/groups/027.html https://www.archives.gov/research/guide-fed-records/groups/0...