Using most recently published state population data from the US Census bureau:

65.7% of the US population lives in "Right To Carry" (Vermont,
Alaska & 37 "Shall Issue") states,

28.1% in "Right Restricted"
(9 "May Issue") states, and

6.3% in "Right Denied" (2) states.

 

For the latest reciprocity info and individual state laws, visit the MO Attorney General's page.