*Excludes Observations that spanned multiple years

Pre 19707
19700
19710
19720
19730
19740
19750
19760
19771
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19891
19901
19910
19920
19930
19940
19950
19965
19970
19980
19990
20000
20015
20026
20034
20045
20057
200610
20079
20086
20099
201045
201151
201253
201353
201449
201544
201644
201744
201846
201928
202024
202122
20224
20231
20241
Total585