I guess it would depend on if you want it measured by months,weeks,days,minutes,seconds,etc.
Why don't you post a question that is more specific?
Hope this helps...o.o
6 percent of 1000 is 60 - whether now, 20 years ago or 20 years from now.
20 years
20 years
it lives 20 to 30 years
20 years
20 years
20 years
20 decades = 2 centuries or 20*10 = 200 years
About 20 years in jail !
20 years older
5-20 years.
20 teeth