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*Excludes Observations that spanned multiple years

Pre 19701
19700
19712
19720
19730
19740
19750
19760
19770
19780
19790
19802
19810
19820
19830
19841
19851
19861
198713
19885
19890
19900
19914
199216
19939
19941
199524
199638
199724
19981
19998
20003
20015
200211
200317
20040
20050
20063
20070
20081
20090
20100
20111
20120
201320
20142
20152
20161
20171
20184
201914
202013
20213
20223
20230
20240
Total255