Oh God I hate this question. Overall from the time I first picked up a guitar until now it'd be about 12 years. But that was stopping and starting until about a year and a half ago and I had a huge 3-4 year gap in between where I got side tracked and didn't play, so in terms of learning the instrument it's more like 3 years, lol. I can enjoy it now much more because there is no pressure to be "good" (I know thats pathetic but too many people thought I was going to be the next Hendrix and it made me struggle to provide the goods so I eventually had enough, teenage pressures! lol)
But yeah, if I'm to be truthful it's somewhere around the 12-year mark.