Year
.
1972
---
---
200
1973
---
---
4 900
1974
21 900
--- a
30 700
1975
65 700
--- a
--- b
1976
---
---
---
1977
---
---
---
1978
---
---
---
a Authorization figures were not broken down to include this category.
b It was estimated in the FY 1976 budget estimate that $62 700 000 would be programmed in FY 1975.