*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19781
19790
19801
19811
19820
19832
19840
19858
19861
19870
19885
19890
19900
199146
199211
199323
199410
19951
19962
19971
19982
199920
200076
20014
20021
20034
20040
20050
20065
20074
20083
20093
20100
20110
20120
20132
20141
20151
20165
20172
20180
Total247