*Excludes Observations that spanned multiple years

Pre 197044
19700
19710
19720
19732
19742
19751
19761
19774
19785
19790
19800
19810
19822
19830
19840
19850
19862
19870
19880
19892
19900
19910
19920
19931
19940
19951
19961
19970
19980
19990
20000
20012
20021
20030
20040
20050
20065
20076
20082
20091
20100
20111
20120
20130
20140
20150
201610
20172
20182
20190
20200
20214
20220
20230
20240
Total104