*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19900
19910
19921
19930
19940
19952
19960
19970
19980
19991
20000
20010
20020
20030
20040
20050
20060
20070
20080
20092
201016
201114
20121
20131
20141
20150
20161
20171
20180
20193
20202
20217
20229
20230
20240
Total63