64 years
206 years passed
So you can determine how much time has passed since an event.
Around 1500 years.
14,000 years.
Because mountains keep cold northern winds from much of India
By observing how much decays in a few days, or in a year, and extrapolating.
Hell yeah! By about 50%
Four years.
Ten years.
Please check your coin again. The phrase "200 Years of Freedom" appears on HALF dollars struck during 1975-76 in celebration of the Bicentennial.
To the year 2009 from 33 AD is 1976 years.
7 years