*Excludes Observations that spanned multiple years

Pre 197022
19700
19710
19721
19730
19740
19750
19760
19770
19782
19790
19800
19810
19822
19830
19840
19850
19862
19870
19881
19890
19902
19910
19920
19930
19940
19952
19960
19970
19980
19991
20007
20010
20021
20034
20040
20050
20060
20070
20080
20090
20100
20111
20122
20131
20140
20150
20165
20170
20180
20190
20200
20210
20220
20230
20240
Total56