*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19772
19780
19791
19800
19811
19820
19830
19841
19850
19862
19870
19880
19890
19900
199162
199215
199310
19940
19954
19968
19970
19980
19990
20000
200114
20020
20031
20040
20052
20066
20070
20080
20090
20103
20111
20123
20135
20141
20152
20164
201710
201815
201917
202019
202114
202222
20233
Total248