Question: What is the average # Of National Votes, when the Election is before 1992, when the % Of Prefectural Vote is 39.5%, when Leader is Takeo Fukuda, and when # Of Seats Won is greater than 63?
SQL: SELECT AVG # of National votes FROM table WHERE Election < 1992 AND % of Prefectural vote = 39.5% AND Leader = takeo fukuda AND # of seats won > 63