*Excludes Observations that spanned multiple years

Pre 19706
19700
19710
19720
19730
19740
19750
19760
19772
19780
19790
19801
19810
19820
19831
19840
19850
19861
19870
19880
19891
19900
19910
19920
19930
19940
19950
19960
19971
19980
19993
20001
20010
20020
20030
20040
20054
20061
20072
20080
20090
20101
20110
20126
2013141
201436
201537
2016128
20172
20188
20198
202011
202151
202220
202315
20247
Total495