*Excludes Observations that spanned multiple years

Pre 19705
19700
19711
19720
19730
19740
19750
19760
19773
19782
19790
19800
19810
19820
19830
19840
19850
19860
19870
19883
19890
19901
19911
19925
19932
199418
19954
19962
199711
19982
199911
20000
200114
20020
20030
20040
20050
20061
20070
20081
20092
20105
20117
20120
20132
20141
20150
20161
20171
20186
20198
202013
20218
20227
20231
20246
Total155