*Excludes Observations that spanned multiple years

Pre 197035
19701
19711
19723
19732
19742
19752
19761
19770
19780
19795
19800
19811
19821
19830
19841
19851
19861
19870
19881
19890
19901
19912
19923
19930
19940
19951
19960
19971
19980
19992
20000
20011
20020
20033
20040
20051
20060
20072
20082
20090
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20210
Total77