Not true. Here are the top 5 plus Star Wars for every year it came out. I added more data for 1999 to prove it wasn't 50/50, even back then. Highlighted is when it is greater than 59% for worldwide box office total.
1999:
1 Star Wars: Episode I - 43.8%/56.2%
2 The Sixth Sense - 43.6%/56.4%
3 Toy Story 2 - 50.7%/49.3%
4 The Matrix - 37.0%/63.0%
5 Tarzan - 38.2%/61.8%
6 The Mummy - 37.4%/62.6%
7 Notting Hill - 31.9%/68.1%
8 The World Is Not Enough - 35.1%/64.9%
9 American Beauty - 36.5%/63.5%
2002:
1 The Lord of the Rings: The Two Towers - 36.8%/63.2%
2 Harry Potter and the Chamber of Secrets - 29.8%/70.2%
3 Spider-Man - 49.1%/50.9%
4 Star Wars: Episode II - 47.2%/52.8%
5 Men in Black II - 43.1%/56.9%
6 Die Another Day - 37.3%/62.7%
2005:
1 Harry Potter and the Goblet of Fire - 32.3%/67.7%
2 Star Wars: Episode III - 44.8%/55.2%
3 The Chronicles of Narnia - 39.2%/60.8%
4 War of the Worlds - 39.6%/60.4%
5 King Kong- 39.6%/60.4%
6 Madagascar - 36.3%/63.7%
There are only 2 movies with international grosses comprising 65% or more on your list.
2014: 3 out of the top 5 (7/10, 12/20) movies have international grosses above 65%.
2013: 3 out of the top 5 (5/10, 12/20) movies have international grosses above 65%.
2012: 3 out of the top 5 (6/10, 10/20) movies have international grosses above 65%.
2011: 4 out of the top 5 (8/10, 13/20) movies have international grosses above 65%.
Do you disagree that the international box office has blown up in recent years?