*Excludes Observations that spanned multiple years

Pre 19704
19700
19710
197210
19730
19740
19750
19760
19770
19780
19790
19803
19810
19821
198311
19846
19859
198663
198729
198821
198939
19908
199156
199285
1993113
1994105
1995174
199667
199773
199852
199972
200027
200155
200268
200319
200488
2005110
200624
200723
200832
200911
201022
201135
20121
20132
20144
20153
201612
201710
20180
Total1547