*Excludes Observations that spanned multiple years

Pre 197016
19700
19710
19720
19730
19742
19750
19760
19770
19780
19790
19800
19812
19821
19831
19842
19850
19861
19870
19880
19890
19900
19911
19921
19932
19940
19951
19962
19973
19980
19992
20002
20011
20021
20030
20040
20054
20060
20070
20080
20092
20101
20110
20121
20132
20141
20150
20160
20170
20180
20191
20200
20211
20220
20231
20241
Total56