*Excludes Observations that spanned multiple years

Pre 197017
19701
19710
19720
19730
19740
19750
19760
19771
19782
19790
19802
19810
19820
19830
19840
19850
19861
19870
19880
19890
19901
19911
19920
19930
19940
19950
19961
19970
19980
19990
20000
20010
20020
20031
20040
20050
20060
20070
20082
20090
20100
20110
20120
20130
20140
20151
20160
20171
20180
20190
20200
20211
20221
20230
20240
Total34