*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19740
19751
19760
19770
19780
19791
19800
19810
19820
19832
19840
19850
19861
19870
19880
19890
19900
19910
19920
19931
19940
19950
19960
19974
19982
19990
20003
20011
20020
20030
20040
20051
20061
20070
20082
20091
20108
20115
20120
201311
20142
20159
201611
201711
201812
20196
20203
20211
20221
20230
20240
Total102