North Dakota vs South Dakota Re: Cell Phone Usage

North Dakota: among 10 states in which more than 30 percent of adults use cell phones exclusively (no land line phones)

South Dakota: among 8 states in which that figure is less than 17 percent

North Dakota spokesman on theory why the difference:

• College students make up greater percentage of adults in North Dakota
• North Dakota is flatter
• Data is wrong

Am I missing something?

• It's possible there are a greater percentage of college students in North Dakota but I doubt it could make that big a difference. South Dakota has several colleges similar to North Dakota's
• North Dakota flatter than South Dakota? LOL -- except for the relatively small area of the Black Hills the two states could not be more alike
• Data could be wrong -- won't even go there

One has to assume 99.99% of all oil workers use cell phones exclusively. Innumerable new oil support services also supporting the oil industry; I'm sure their personnel pretty much use cell phones exclusively

Am I missing something? Probably.