Wales received a significant amount of income from mining in the nineteenth and twentieth century.
== Economy ==Over the last 250 years, Wales has been transformed from a predominantly agricultural country to an industrial, and then to a post-industrial economy
 Most of the increase came in the coal mining districts, especially Glamorganshire, which grew from 71,000 in 1801 to 232,000 in 1851 and 1,122,000 in 1911

