*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19850
19860
19870
19880
19890
19900
199116
199261
19939
19944
19950
19960
19970
19980
199914
20008
20017
20020
20030
20040
20050
20060
20070
20081
20090
20100
20114
20120
20131
20140
20150
20161
20170
20180
20190
20200
20210
20220
20230
20240
Total127