*Excludes Observations that spanned multiple years

Pre 19708
19700
19716
19721
19730
19740
19750
19760
19770
19780
19790
19800
19811
19821
19830
19841
19850
198653
1987103
1988201
198925
199048
1991119
199297
1993107
199426
1995132
199696
1997127
19989
1999104
200039
200137
200224
200327
200431
200513
20064
200725
200821
200928
201019
201114
20126
201310
201418
201515
20168
20174
20187
20198
20206
202149
20228
202311
20240
Total1697