*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19771
19780
19791
19801
19810
19820
19830
19841
19850
19861
19870
19885
19890
19901
199124
19920
19939
19940
19954
19964
19971
19980
19990
20000
20010
20022
20031
20041
20050
20062
20070
20087
20090
201019
201144
20123
20137
20146
20151
20165
201711
201815
201952
202021
202145
202245
20235
20240
Total346