*Excludes Observations that spanned multiple years

Pre 19705
19700
19711
19720
19730
19740
19752
19760
19770
19780
19790
19801
19810
19820
19830
19840
19853
19862
198729
198815
198919
19902
199138
199215
1993162
199475
199596
199638
199724
199816
19997
200022
200110
200212
20037
200411
200514
200614
20077
20088
20098
201016
20119
201217
201314
201411
201515
201621
201714
201814
201913
202012
202142
202229
202315
20242
Total907