*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19732
19741
19750
19760
19771
19780
19791
19800
19810
19820
19830
19840
19850
19865
19870
19880
19890
19900
19911
19926
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20041
20050
20060
20070
20080
20092
201015
20118
20121
20139
20140
20151
20162
20171
20184
20194
20200
20213
202210
20236
20240
Total84