*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19811
19820
19830
19840
19851
19860
19870
19881
19890
19901
19911
19924
19933
19942
19950
19962
19970
19980
19992
20005
200110
20020
20031
20041
20052
20060
20071
20085
20093
201010
201114
20124
20133
20146
20153
201611
20174
20180
Total103