*Excludes Observations that spanned multiple years

Pre 19703
19701
19711
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19881
19895
19900
199112
19922
19939
19940
199518
19966
199715
19980
19992
20003
20013
20020
20030
20044
20050
20066
20071
20087
20093
20100
20118
20120
20132
20144
20150
20167
20177
201821
201927
202037
202126
202253
202347
20246
Total347