Estimated number of zip codes distant	Percent	Cumulative percent
1	18.6%
2	11.7%	30.3%
3–5	20.1%	50.4%
6–10	12.4%	62.8%
11–50	15.8%	78.6%
51–100	6.2%	84.8%
101–250	6.1%	90.9%
251 or more	9.1%	100.0%