*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19721
19730
19741
19750
19761
19770
19780
19790
19801
19810
19823
19831
19840
19850
19861
19870
19880
19890
19900
19910
19921
19930
19942
19951
19962
19970
19980
19992
20002
20010
20020
20030
20041
20050
20060
20071
20081
20095
20101
20111
20120
20132
20140
20150
20160
20170
20180
20190
20200
Total34