*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19900
19910
19920
19931
19940
19951
19960
19973
19980
199910
20000
20010
20020
20031
20040
20058
20060
20071
200818
20090
20106
20114
20122
20133
20145
20154
20163
20171
20186
20195
20201
20212
20222
20230
20240
Total89