现在放出真正的关键材料吧:
http://www.cbs.nl/NR/rdonlyres/3546217E-B8F4-474A-B2C5-7890BCD840E8/0/2012a332pub.pdf
Food for thought
Dietary and health trends in the Netherlands
这是关于荷兰食品市场的各方面统计数据的汇总,在该报告的第八页,以大字标明:
A Dutch dairy cow produces
22 litres of milk per day
——荷兰奶牛每天产出22公升牛奶
Milk production per cow nearly doubled in recent decades. In 1950 one
dairy cow produced about 3 500 litres of milk a year. In 1999 it was 7
000 litres. This means that the daily milk production per cow went from
11.5 to 23 litres in the last 50 years.