*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19860
19871
19881
19893
19900
19910
19920
19932
19941
19952
19961
19970
19981
19991
20000
20011
20021
20032
20041
20050
20060
20070
20080
20092
20101
20112
20121
20132
20140
20151
20162
20170
20183
20190
20200
20210
20220
20230
20240
Total33