*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19721
19731
19741
19751
19760
19770
19784
19790
19801
19810
19820
19830
19842
19855
19860
19871
19889
19892
19904
19910
199210
19934
19943
19953
19961
19974
19981
19993
20004
20011
20021
20030
20042
20054
20062
20076
20082
20092
20101
20111
20121
20137
20140
20150
20161
20171
20180
Total102