| Last | State | % Correct |
|---|---|---|
| 2018 | Colorado | 89%
|
| 1986 | New York | 79%
|
| 2003 | Utah | 79%
|
| 2017 | California | 74%
|
| 2018 | Vermont | 74%
|
| 2018 | Alberta | 68%
|
| 1972 | Washington | 68%
|
| 1971 | Maine | 63%
|
| 2013 | Quebec | 63%
|
| 1991 | New Hampshire | 53%
|
| 2008 | British Columbia | 47%
|
| 1977 | Idaho | 47%
|
| 1975 | Wyoming | 37%
|
| 1973 | Alaska | 16%
|