*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
19900
19910
19920
19930
19940
19951
19960
19970
19981
19990
20000
20010
20021
20030
20040
20054
20060
20070
200814
200952
20109
20112
20122
20135
20144
20152
20164
20172
20183
20196
20203
20213
20221
20230
20240
Total119