*Excludes Observations that spanned multiple years

Pre 19700
19701
19710
19720
19730
19741
19750
19761
19772
19782
19790
19800
19810
19820
19831
19840
19850
19860
19879
19885
19892
19900
19911
199212
19932
19945
19959
19966
199715
19988
199911
200017
20012
20021
200310
20042
20051
20063
20072
20082
20091
20104
20112
20120
20130
20142
20152
20162
20171
20180
Total147