*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19784
19790
19800
19810
19820
19831
19840
19853
19860
19871
19881
19892
19901
19911
19921
19932
19942
19958
19961
19971
19981
19991
20002
20010
20020
20030
20040
20052
20062
20072
20080
20091
20101
20114
201215
201319
20141
20152
20160
20171
20181
20191
20200
20210
20220
Total85