Is Hillary Clinton Right That Americans Haven’t Had a Raise in 15 Years?

During last night's Democratic presidential debate in Milwaukee, former Secretary of State Hillary Clinton said, "I know a lot of Americans are angry about the economy. And for good cause. Americans haven't had a raise in 15 years. There aren't enough good-paying jobs, especially for young people. And yes, the economy is rigged in favor of those at the top." Rigged economy aside, was she correct in saying that Americans haven't seen an increase in pay since the turn of the last century?