*Excludes Observations that spanned multiple years

Pre 19708
19701
19711
19721
19730
19741
19750
19760
19770
19780
19791
19802
19810
19820
19830
19840
19850
19862
19870
19880
19893
19902
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20110
20120
20131
20140
20150
20160
20170
20180
20190
20202
20210
20221
20230
20240
Total26