*Excludes Observations that spanned multiple years

Pre 197010
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19931
19940
19950
19960
19973
19982
19997
20008
20010
20022
20031
20040
20050
20068
20070
20082
200911
20101
20110
20126
20130
20140
20150
20161
20170
20181
20190
20200
202121
20220
20232
20240
Total87