*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19911
19921
19930
19940
19950
19960
19970
19982
19995
20003
20010
20020
20030
20040
20050
20060
20070
20080
20091
20100
20111
20120
20130
20140
20151
20161
201715
20184
20191
20203
20210
20221
20232
20240
Total43