No study I am aware of that has that data.
the north did
the north did
the north did
There is about a 1 to 15 or so boy to girl ratio in North England and 1 to 13 ratio in South England. The ratio in America is 1 to 29.5 girl to boy ratio.
The south
Many are made in North haven CT. Some are contracted out to South America.
while the southern states produced two-thirds of the world's supply of cotton, the South had little manufacturing capability, about 29 percent of the railroad tracks, and only 13 percent of the nation's banks while The North produced 17 times more cotton and woolen textiles than the South, 30 times more leather goods, 20 times more pig iron, and 32 times more firearms. The North produced 3,200 firearms to every 100 produced in the South
South
You need to ask a lawyer who is familiar with firearms law.
South to north
It is an analogy. North Carolina is to South Carolina as North Dakota is to South Dakota.
South to North