*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19850
19860
19871
19880
19890
19900
19910
19920
19930
19940
19952
19961
19970
19980
19990
20000
20010
20020
20030
20040
20054
20062
20070
20080
20091
20100
20110
20121
20132
20140
20150
20160
20170
20180
20192
20200
20210
20220
20231
20240
Total19