I can't say exactly that. But a decent spousal income helps with the stability. We married young and at first she wasn't an income producer. Went to school and she is now a RN. I still make more but we are SOOOO much more flexible and it allows me to take a step back income wise to take two steps forward down the road when trying to advance the career.

That said, I do tell the youngins to not marry until they are at their destination job. It's really frustrating having to negotiate every career decision when your 'partner' doesn't really get it. Think really hard before you do the "I does".