*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
197220
197315
19740
19750
19760
19770
19780
19791
19801
19810
19820
19832
19841
19853
19866
198722
198880
198925
199099
1991176
1992161
199353
199426
19952
19969
19973
199810
199950
200047
200186
200216
20033
200410
200520
20069
20073
20088
20095
201059
201160
201229
201319
201423
201530
201648
201720
20180
20190
Total1262