*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19852
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19982
19990
20000
20010
20020
20030
20040
20050
20060
20070
200812
200911
201018
201114
20120
20130
20140
20151
20163
201712
20184
20190
20203
20214
20228
202312
20241
Total107