*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19740
19750
19761
19770
19780
19790
19800
19810
19820
19832
19841
19850
19861
19870
19881
19890
19904
19915
19927
19933
19947
199514
19965
19977
19984
19994
20005
20013
20021
20031
20040
20050
20063
20072
20081
20090
20103
20111
20122
20137
20140
20152
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total98