*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19800
19810
19820
19831
19840
19850
19860
19872
198819
19891
199045
199146
199247
199349
199417
199571
19962
19971
19980
19995
200010
20011
20020
20039
20046
20056
200615
200725
200834
200926
201033
201121
201219
201324
201424
201519
201611
201730
201824
201919
20209
202123
202215
20238
20240
Total723