*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19851
19860
19875
198812
19894
19907
19912
19921
19935
19944
199512
199612
19977
19980
19996
20002
200111
20023
200329
200435
20059
200617
200721
200831
200934
201026
201111
201239
201331
201420
20158
201614
201720
201823
201918
202010
202111
202215
20230
20247
Total527