*Excludes Observations that spanned multiple years

Pre 19700
19701
19710
19720
19732
19744
19752
19760
19772
19781
19791
19802
19812
19825
19832
19841
19855
19860
19870
19880
19892
19900
19910
19920
19931
19940
19956
19962
19970
19980
19992
20001
20010
20020
20030
20040
20050
20061
20070
20080
20090
20102
20110
20120
20131
20142
20150
20160
20170
20181
20190
20200
Total51