*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19860
19870
19880
19890
19900
19913
19923
19931
19940
199519
199619
19971
19980
19993
20000
20010
20022
20030
20043
20054
20065
20070
20082
20094
20102
20113
20122
20134
20145
20155
20166
20171
20182
20192
20200
20214
20227
20235
20240
Total118