*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19732
19741
19751
19760
19770
19781
19792
19800
19810
19821
19830
19840
19850
19860
19870
19881
19890
19900
19910
19921
19930
19940
19950
19962
19970
19980
19990
20001
20010
20020
20030
20042
20050
20060
20070
20081
20090
20102
20111
20121
20131
20140
20150
20160
20173
20182
20190
20201
20214
20223
20234
20240
Total38