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*Excludes Observations that spanned multiple years

Pre 197046
19700
19710
19721
19730
19740
19753
19760
19772
19781
19790
19800
19811
19820
19831
19840
19850
19861
19870
19880
19890
19900
19911
19921
19932
19940
19953
19966
199726
19980
199916
20000
20010
20020
20034
20040
20050
20060
20070
20080
20090
20100
20110
20120
20130
20141
20150
20161
20170
20180
20190
20200
20211
20220
20230
20240
Total118