I happened across this in Marie Claire’s August 2007 issue just after submitting a request for 6 days off from work (because our work week includes weekends, not just weekdays) for a vacation in the fall.
Minimum Required Vacation Time Around the World
0 days – China, U.S.
1 week – Hong Kong, Singapore, Mexico
2 weeks – Canada, Japan
3 weeks – Colombia, New Zealand
4 weeks – Most of Europe, Australia
5 weeks – Norway, Sweden, France
6 weeks – Germany, Finland