More than once, we discussed how many foreign components a certain country index, e.g. SMI or S&P500, would contain. This is difficult to establish.
There is now an article on Morninstar Schweiz analysing the source of revenues for S&P500 companies. The result is contained in a graphic that I do not want to post here to not get (us) into copyright trouble.
The results are:
62.3% USA
7.5% China
3.6% Japan
2.9% Germany
2.8% U.K.
1.9% France
1.7% Canada
1.6% India
1.4% Brasil
1.0% Mexico
1.0% Russia
1.0% South Korea
(Europe = 14%)
The data is here, but the articles vanish usually after a certain time (save it if you find it interesting):