Your chart shows a flat spot of 16 years across the 80s, and another one of about 25 years measured from the very peak of the market in 29.. So you're right, though that figure isn't impressively different.
The figure I was remembering was actually about a 60/40 balanced stock+bonds fund like VBINX, which is what I'd recommend to anyone anyway.
The figure I was remembering was actually about a 60/40 balanced stock+bonds fund like VBINX, which is what I'd recommend to anyone anyway.