*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
19880
19890
19901
199139
19925
19932
19941
19953
19960
19970
19980
19990
20000
20010
20020
20030
20040
20052
20062
20070
20081
20090
20100
20110
20121
20136
20140
20150
20164
20177
20184
201912
20206
20216
20221
20230
20240
Total103