Excellent summation, well done. I looked at the document for 2010 but could not find the total number of registered voters compared to turnout, have you come across any?
if you go to the link, it has the results for EVERY national race from 1948 to 2010...I got my summaries by adding the numbers.
Here are the TOTAL Democrat/Republican votes for each of the NY 9 races (I excluded third parties, remember:)
1980: 98,249
1982: 95,638
1984: 125,509
1986: 68,778
1988: 72,851
1990: 48,507
1992: 111,424
1994: 121,154
1996: 130,385
1998: 91,760
2000: 137,214
2002: 84,896
2004: 148,225
2006: 67,040
2008: 106,097
2010: 104,761
I do NOT know how these numbers reflect the turnout PERCENTAGE, THOUGH...