*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19861
19872
19881
19891
19902
19911
19921
19930
19940
19950
19962
19971
19980
19990
20000
20010
20021
20031
20040
20051
20060
20070
20083
20090
20100
20111
20120
20131
20140
20150
20160
20170
20181
20190
20200
20210
20220
20230
20240
Total22