*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19921
199312
19943
19951
19960
19970
19980
19990
20000
20010
20020
20032
20040
20050
20061
20070
20080
20090
20102
20114
20121
20134
20140
20150
20161
201720
201836
20196
20207
20210
20221
Total103