*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19881
19892
19901
19910
19920
19931
19940
19951
19961
19971
19980
19990
20000
20010
20020
20033
20040
20052
20064
20076
20083
20094
20107
20112
20120
20135
20144
20150
20165
20173
20181
20194
20201
20213
20221
20230
20240
Total66