*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19731
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19851
19860
19870
19880
19891
19900
19912
19920
19930
19942
19951
19960
199796
19980
19992
20001
20015
200293
20030
200410
20051
20060
20071
20081
20092
20100
20111
20121
20132
20141
20154
20162
20177
201817
20196
20204
20214
20225
20239
20240
Total287