*Excludes Observations that spanned multiple years

Pre 19700
19701
19710
19720
19730
19740
19750
19764
19772
19780
19791
19802
19813
19820
19830
19841
19850
19862
19870
19880
19890
19900
19910
199212
199321
19942
19951
19962
199732
19980
19991
20000
200169
20022
20031
20041
20055
200611
20070
20083
20090
20109
201114
20129
201339
201433
201542
201662
201766
201856
201928
20200
20210
20220
Total537