Table:
text: Rosi Mittermaier
World Cup results
Season standings
Season Age Overall Slalom Giant_Slalom Super_G Downhill Combined_
1967 16 27 19 — not , run — not , awarded
1968 17 12 11 8 not , run — not , awarded
1969 18 7 4 11 not , run 5 not , awarded
1970 19 11 8 10 not , run 12 not , awarded
1971 20 14 13 9 not , run 15 not , awarded
1972 21 6 4 7 not , run 10 not , awarded
1973 22 4 2 8 not , run 9 not , awarded
1974 23 7 2 13 not , run 11 not , awarded

text: Rosi Mittermaier
World Cup results
Season standings
Season Age Overall Slalom Giant_Slalom Super_G Downhill Combined_
1975 24 3 7 7 not , run 6 not , awarded
1976 25 1 1 3 not , run 9 1

Question: In what year was Rosi Mittermaier's last season?

Question: What is the average age of Rosi Mittermaier?