*Excludes Observations that spanned multiple years

Pre 19706
19700
19710
19720
19730
19740
19750
19760
19771
19780
19790
19801
19810
19821
19830
19842
19850
19860
19870
19880
19890
19900
19911
19921
19933
19942
19951
19960
19970
19980
19990
20002
20010
20021
20030
20040
20050
20061
20070
20080
20091
20100
20110
20120
20131
20140
20150
20160
20170
20181
20190
20200
20211
20220
20230
20242
Total29