*Excludes Observations that spanned multiple years

Pre 19704
19700
19711
19720
19730
19740
19751
19763
19770
19781
19792
19800
19811
19822
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19932
19941
19952
19961
19972
19980
19990
20000
20010
20020
20030
20041
20051
20060
200712
200813
200923
201013
201112
201214
201316
201414
20154
20160
20172
Total148