*Excludes Observations that spanned multiple years

Pre 197060
19700
19710
19720
19731
19741
19750
19761
19775
19782
19790
19800
19810
19820
19830
19840
19850
19861
19870
19880
19893
19900
19910
19921
19934
19940
199517
199653
1997110
19980
199944
20000
20010
20020
20031
20040
20050
20060
20074
20080
20090
20102
20110
20122
20130
20140
20150
20160
20171
20180
20190
20200
20214
20220
20230
20240
Total317