Year
.
1969
37 000
32 231
1970
36 900
34 863
1971
39 800
37 949
1972
38 000
38 798
1973
38 000
11 100
1974
33 700
32 975
1975
12 000
37 489
1976
48 600a
40 309
1977
43 000
41 500
1978
46 800
46 570
a Includes $10 200 000 for the transition quarter.