In regard to my previous post. I spend many hours in front of a computer every day. In fact, I know precisely that I spent 2268 hours in 2003 (I know this thanks to my LCD monitor counter back then). So it was an average 6 hours per day. But since 2004, due to my full-time programming job, that time has increased even more. The computers are now my everyday tool, so I don't limit myself only to the programming activities, but I also do Web surfing, instant communication and watching movies and TV shows regularly. It's now quite common to spend even more than 12 hours a day.
So, let me assume that my average time in front of a computer was 9 hours per day in the last 15 years. This means that I spent a total of 49275 hours, which gives the continuous 5.6 years so far...