Year
.
1969
---
732
1970
630
333
1971
590
2969
1972
700
2269
1973
2450
1720
1974
1750
--- a
1975
1840
---
a The amount programmed for network operations and control technology was estimated at $1 590 000 in the FY 1975 budget estimate; the advanced systems category was not broken down by individual projects in the FY 1976 through FY 1980 budget estimates.