*Excludes Observations that spanned multiple years

Pre 19703
19700
19711
19720
19730
19740
19750
19765
19770
19780
19790
19800
19810
19825
19834
19845
19850
198663
19871
19881
198915
199028
19914
19923
19930
19940
19953
19960
19970
19981
19998
20002
20017
20025
20033
20046
20055
200622
20075
20086
200912
20102
20111
20129
20131
20140
20150
201626
20170
Total262