*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19781
19791
19801
19811
19821
19831
19842
19855
19861
19870
19887
19890
199010
19913
199211
19933
19948
199511
19961
19971
19981
19992
20001
20014
20020
200315
20048
200510
20068
20074
200812
20098
20109
201111
20129
20137
201410
20159
201610
201717
20189
20196
20201
20218
20229
20235
20243
Total266