The following sources are cited in SAP Digital Futures Issue 24: Taking Learning Back to School

Denmark spends the most GDP on labor market programs at 3.3%.
“Public Spending on Labour Markets (Indicator),” OECD Data, accessed March 22, 2017, doi:10.1787/911b8753-en 

The U.S. spends only 0.1% of its GDP on adult education and workforce retraining.
“Coming and Going: Truth and Myth About the Effects of Openness to Trade,”, The Economist, September 29, 2016, 

The number of post-secondary vocational and training institutions in China more than doubled from 2000 to 2014.
Hong Shen, Shen Hua, and D. Bruce Johnstone, Higher Education Finance in China, University of Buffalo Graduate School of Education, February 2017,

47% of U.S. jobs are at risk for automation.
Carl Benedikt Frey et al., Technology at Work v2.0, Citi GPS and Oxford Martin School, January 2016,