Code coverage statistics on major projects

I am trying to find out the code coverage statistics on major projects/major companies:

For example:

1. What is the code coverage of the PERL code base? According to one of the answers on this post, it is 70%

2. What is the code coverage of some of the projects at Microsoft?

3. Any other libraries for which these statistics are开发者_开发知识库 available.

1. Plenty of Java projects, code coverage and much more are available on Nemo.
2. Amazing document: How SQLite Is Tested.

According to this 2007 by B-Harry, the code coverage minimum bar for TFS project is set at 70% link