you have no logical reasoning. it's impossible for you to have worked 20 years even if you stipulate being 40 years old. you would have had to work since you were 20 years old. and since you went to school (supposedly) for 5 years or so and you have been posting here since 2012 without working that's a 10 year gap without work. (so the max you could have worked is 10 years).