*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19771
19780
19790
19800
19810
19820
19831
19840
19850
19860
19871
198815
19890
19900
19911
19925
19939
19940
19950
19960
19970
19980
19990
20001
20010
20020
20032
20040
20050
20061
20071
20080
20092
20101
20112
20121
20130
20144
20151
20160
20170
20180
20192
20202
20217
20221
20232
20241
Total65