This is my progress to date:

    Approximate Birth Year  Total I Have Found
         
  Me 1950    
1 Parents 1920 2         2
2 Grandparents 1890 4 4
3 Great Grandparents 1860 8  8
4 2nd Great Grandparents 1830 16 11
5 3rd Great Grandparents 1800 32 21
6 4th Great Grandparents 1770 64  22
7 5th Great Grandparents 1740 128 15
8 6th Great Grandparents 1710 256 11
9 7th Great Grandparents 1680 512 9
10 8th Great Grandparents 1650 1,024 3
11 9th Great Grandparents 1620 2,048

 None

         
  Total   4,094

74