*Excludes Observations that spanned multiple years

Pre 1970109
19700
19710
19723
19732
19741
19752
19762
19772
19782
19793
19800
19810
19821
19830
19840
19850
19860
19870
19880
19891
19901
19910
19920
19930
19940
19952
19961
19972
19981
19990
20000
20011
20020
20034
20046
200523
200617
20078
200819
20095
201024
20110
20124
20139
201432
201510
20162
20171
Total300