Year
.
1969
12 100
7 489
1970
8 800
7 089
1971
11 300
5 691
1972
9 420
7 637
1973
11 226
12 330
1974
9 050
15 948
1975
16 970
13 083
1976
12 600 a
6 671
1977
7 100
9 619
1978
7 900
4 610
a Includes $4 300 000 for the transition quarter.