Are you actually taking income out of this portfolio? I'm in my mid-thirties, so I invest in index funds, but any dividends are re-invested. It's not something I intend to touch until retirement or some extraordinary situation.
It varies. Since I'm a consultant, if I take a vacation or have a dry spell then I do have to take income from the dividends. In other cases, I reinvest all the dividends (and my earnings).