*Excludes Observations that spanned multiple years

Pre 197030
19700
19710
19720
19730
19740
19751
19760
19773
19781
19790
19800
19810
19820
19830
19840
19850
19861
19870
19880
19890
19900
19910
19920
19930
19940
19952
19960
19970
19982
19990
20000
20010
20020
20032
20040
20050
20060
20070
20081
20090
20100
20111
20122
20132
20140
20150
20161
20170
20180
20190
20200
20210
20220
20230
20240
Total49