How Old Were the Founding Fathers on July 4, 1776?

From Ace of Spades HQ:

We tend to always think of them of them as old men based mainly on portraits made later in their lives but in 1776 they were surprisingly young. But then revolution has always been a young man's game.

Marquis de Lafayette, 18
James Monroe, 18
Gilbert Stuart, 20
Aaron Burr, 20
Alexander Hamilton, 21
Betsy Ross, 24
James Madison, 25
John Paul Jones, 28
Thomas Jefferson, 33
Thomas Paine, 39
John Adams, 40
Paul Revere, 41
George Washington, 44
Samuel Adams, 53

Benjamin Franklin was the old man of the revolutionaries at 70 years old.

Wow, they were so young. It really puts a new perspective on what these men risked, doesn't it.