Take this to heart: Salaries have nothing to do with age.
There is only what you're worth and what you negotiate for.
I spent 5 years at my current company, where they raised my salary by 10-15% a year but the value of my skills and experience was growing more like 30% a year. We eventually reached an impasse where they claimed they were being more than generous, and I felt that they were severely underpaying me relative to market.
So I went and got another job offer, picked a moment when I had a lot of leverage, handed in my notice and gave them 2 days to persuade me to change my mind about leaving.
They doubled what they were paying me.
The moral of the story is that you should know what you're worth, negotiate accordingly, and be willing to leave and go where you're appropriately valued.