*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19781
19791
19800
19810
19822
19830
19840
19850
19860
19870
19880
19890
19900
19911
19920
19930
19940
19950
19960
19970
19980
19990
20000
20011
20020
20030
20040
20050
20061
20071
20082
20090
20107
20116
20120
20134
20140
20152
20162
20170
20185
20191
20202
20210
20220
20232
20241
Total42