*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19742
19751
19760
19770
19780
19791
19801
19810
19820
19830
19840
19858
19861
19871
19880
19890
199020
19911
19924
19936
19940
19950
19961
19972
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20080
20091
20100
20110
20121
20130
20140
20153
20161
20172
20180
20191
20200
Total58