Sweden has fortified low-fat milk with a small amount of vitamin D since 1983
Yahoo Answers Feb 2014
Info in Swedish can be found here
applies to low-fat milk only - milk containing fat below 1,5% has to be enriched with Vitamin D. Vitamin D content must be between 3,8-5 micrograms/litre.
4 micrograms/litre= 160 IU/liter
Many organizations now recommend 4,0000 IU of vitamin D3 per day for adults
which would requre 25 liters of low-fat milk
And, we hope that Sweden fortififies with D3, not D2
See also VitaminDWiki
Milk fortification of 1000 IU got most children above 20ng of vitamin D – March 2013
Most people have major problems of milk as a source of vitamin D
Sweden will increase vitamin D food fortification a bit in Oct 2016
Full-fat milk for children associated with higher Vitamin D and lower BMI – Dec 2016
Vitamin D levels dropped when consuming 2 brands of fortified milk in the winter– trial June 2018
Whole-Fat or Nonfat Dairy -The Debate Continues (less vitamin D) - Dec 2018
Children no longer get much vitamin D from milk - fortify at home