*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19752
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19861
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20032
20040
20050
20060
20070
20080
20090
20102
20113
20120
20130
20140
20150
20162
20173
20182
20191
20200
20210
20220
20230
20240
Total20