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*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
19888
19894
19902
19912
19921
199315
19947
19950
19960
19970
19980
19990
20000
20010
20020
20030
20046
20052
20060
20079
20082
200910
20103
20110
201211
20130
20149
20150
20162
20179
20182
201911
20202
20213
202214
20231
20240
Total135