*Excludes Observations that spanned multiple years

Pre 197010
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19887
19899
19903
19913
19924
19934
19942
199514
199614
19978
19980
19996
20004
20010
20020
20033
20040
20052
20060
20072
20083
20091
20102
20113
20120
201314
20141
20153
20166
20176
20187
20197
202017
202131
20229
202312
20246
Total223