*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19882
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20031
20041
20051
20060
20070
20081
20090
20101
20110
201213
201328
20146
20153
20163
20171
20180
20190
20200
20210
20220
20231
20240
Total62