65,000mm/year = metres/year
To convert millimeters (mm) to meters (m), you need to divide the measurement by 1000 because there are 1000 millimeters in one meter.
65,000 mm/year = 65,000 / 1000 = 65 meters/year.
65,000 mm/year = 65,000 / 1000 = 65 meters/year.