*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19731
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19881
19890
19900
19910
19920
19930
19942
19950
19963
19971
19981
19991
20001
20013
20021
20030
20040
20051
20060
20070
20080
20090
20100
201118
20121
20130
20146
201510
201645
201711
20188
201950
202041
202149
202244
202331
20241
Total333