I'd say it's probably closer to 70% if not more. Most nutritional labels in Canada and the US include a foot note about being based on a 2000 calorie which completely neglects to mention that it's based on the assumption that people are getting a minimum of the hour of daily recommended exercise doctors and scientists suggest and I know a lot of people who assume that either applies to them and are fat, or manage to stay slim purely through intuition and being raised on good food habits. Outside of North America is very different when it comes to food though, so I can't speak to percentages in other countries.