Safari version number?

I am developing a plugin of safari on MAC.Now I want to know all the version number for safari3,safari4,Because I can see that in some plugin samplecode info.plist: the MinBundleVersion is 5530, and I check my safari verison is :3.1.2（5525.20.1）, I think some user's safari3 version will be lower than my. but I don't know the lowest version number of safari3. I have search f开发者_运维知识库or Apple web , and get nothing for it , Thank you very much!

Maybe this will help: Safari Version History

BR,

Dawid