This only reflects your own narrow mindset.
It can easily be 30+ years, ten times your maximum number.
Those 1 year > 5%, which is the ratio of profitable traders of the Forex Market, really nice to hear.
This is senseless. You can't even say you are profitable in 1 year (how much signals where profitable for 6/9 or even 12 months to suddenly crash), 3 years start to be more serious.
I'm using a manual system for 5 years.
It took 15 years of experience (first 10 years only in stock/future markets and last 5 years both in FX and in stock/future markets) and part-time work to develop.
I call it 4:4:8 (that is, 1:4 leverage - % 4 monthly profit on average - % 8 drawdown so far).
I trade only in EURUSD.