*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19731
19741
19750
19761
19770
19780
19792
19801
19810
19821
19830
19841
19852
19860
19870
19885
19890
19901
199127
199223
199326
19946
199537
19960
19976
19987
19990
20006
20017
20023
20031
20048
20051
20064
20072
20088
20096
201012
201123
20126
20138
20145
201510
20169
201713
201815
201954
202021
202155
202232
202331
20247
Total496