*Excludes Observations that spanned multiple years

Pre 197013
19700
19711
19720
19732
19740
19752
19763
19771
19781
19790
19803
19812
19827
19833
19843
19850
19860
19870
19880
19890
19900
19911
19920
19936
19943
19952
19963
19970
19986
19992
20000
20012
20020
20031
20040
20050
20060
20071
20082
20090
20101
20110
20120
20130
20140
20150
20161
20171
20180
20190
20200
20210
20220
Total73