*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19852
19862
19871
198812
19894
19903
19919
19921
19932
19942
19952
19960
19970
19981
19990
20003
20011
20021
20030
20040
20051
20061
20070
20080
20094
20102
20117
20127
20136
20145
20153
20164
20174
201817
201913
202019
202141
202241
202336
202410
Total267