*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19831
19842
19850
19860
19870
19883
19890
19900
19910
19921
19930
19942
19956
19960
19971
19980
19990
20000
20010
20020
20030
20040
20051
20060
20071
20084
20092
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total27