*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19841
19850
19860
19870
19881
19890
19902
19913
19922
19935
19940
19952
19963
19970
19980
19990
20000
20010
20020
20031
20040
20050
20060
20071
20080
20092
20102
20114
20126
20139
20142
20151
20163
20171
20180
20191
20203
20218
20225
20233
20240
Total72