However, one of the most important explanations was the change in eating habits, including a 40 per cent rise since the 1980s in the proportion of calories coming from fat in the average diet.

但是，最重要的解释之一则是饮食习惯的改变：自上世纪80年代以来，来自日常饮食所含脂肪的热量比例提高了40%。