High Internet penetration can be found along both the Atlantic and Pacific coasts, as well as in the Rocky Mountain States. Meanwhile, in the interior of the country, especially in the Midwest and the South, Internet use lags greatly behind the national average. These variances can be traced to, among other things, differences among the regions in income and education levels. Those regions with a relatively wealthy and highly educated adult population are more likely to have a larger proportion of its adults online. Internet users in different regions vary in how they use the Internet, such as in frequency and duration of use on a daily basis. Also, certain online activities are more popular in certain regions than they are in others.