*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19783
19790
19800
19810
19820
19830
19841
19851
19860
19870
19880
19890
19901
19911
19924
19939
19942
199511
19961
19972
19981
19990
20000
20010
20021
20036
20042
20051
20061
20073
20085
20095
20101
20112
20122
20131
20141
20152
20162
20172
20180
20192
20202
20212
20225
20235
20240
Total90