*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20042
20052
20060
20071
20082
20090
20100
20110
201213
20136
20141
20151
20160
20171
20183
20190
20200
20213
202213
20234
20240
Total53