*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
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19991
20000
20010
20020
20030
20040
20050
20061
20070
20081
200910
20100
20111
20121
20130
20148
201542
20161218
20170
201857
201967
202024
20211
2022101
202343
20244
Total1581