*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19772
19782
19790
19800
19810
19820
19830
19840
19850
19861
198714
19888
19892
199025
19918
199212
19933
19945
19954
19964
19972
19980
19990
20000
20014
20023
20030
20042
20051
20063
20070
20080
20090
20101
20110
20120
20131
20140
20150
20160
20170
20180
20190
20200
Total110