*Excludes Observations that spanned multiple years

Pre 197031
19700
19710
19720
19730
19740
19752
19760
19773
19782
19790
19800
19810
19820
19830
19840
19850
19861
19871
19880
19890
19900
199116
19921
19938
19941
199516
199610
19979
19980
199915
20002
20010
20022
20031
20040
20050
20060
20070
20080
20090
20100
20111
20120
20131
20140
20150
20162
20170
20180
20190
20200
20212
20220
20230
20240
Total127