*Excludes Observations that spanned multiple years

Pre 19707
19700
19710
19720
19730
19740
19750
19760
19770
19783
19790
19800
19810
19822
19831
19840
19852
19860
19870
19885
19892
199013
19913
199213
199316
19949
19958
19963
199711
19985
19991
20002
20014
20021
20031
20041
20055
200611
20074
20080
20097
20102
20112
201212
201315
20140
20150
20161
20170
20181
20190
20200
20210
20220
20230
20240
Total173