*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19751
19762
19770
19784
19791
19800
19810
19822
19831
19840
19850
19860
19870
19880
19890
19900
19911
19923
19933
19942
199512
19960
19970
19981
19990
20000
20016
20020
20030
20040
20050
20061
20073
20081
20094
20103
20113
20126
20137
20140
20150
20160
20173
20180
20196
20200
20210
20220
Total76