*Excludes Observations that spanned multiple years

Pre 19704
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19882
19894
19900
19912
19922
199313
19943
19953
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20081
20091
20100
20110
20121
20133
20140
20150
20161
20170
20181
20190
20200
20210
20220
20231
20240
Total42