A couple of years ago, I did a similar climbing poll based upon feet per hour. I thought it would be fun to do it again but this time Euro style and use VAM. From Wiki with edits by Hermes for brevity.
VAM is an acronym for the Italian phrase 'velocità ascensionale media,' which means 'average ascent speed' and is the speed of elevation gain, in meters per hour.
VAM is a measure of fitness and speed and can be useful for making relative comparisons of performances and estimating a rider's power output per kilogram of body mass.
Dr Ferrari, who coined the term, also stated that every one percent increase in average gradient increases VAM by 50. For example, a 1650 VAM (pro cyclist metric) on a climb of 8 percent average grade is a performance equivalent to a VAM of 1700 on 9 percent average grade. Ambient conditions (e.g. friction, air resistance) have less effect on steeper slopes (absorb less power) since speeds are lower than on gentler slopes
The other interesting calculation is W/Kg which can be determined by using this calculator by inputing VAM and the % grade. http://www.cyclingfitness.net/online-vam-calculator/
The best data will come from climbs longer than 20 minutes but use the data you have.
STRAVA users get their VAM calculated on segments by the software.
To calculate VAM from Feet per hour multiple feet per hour by .3048. So 2000 fph is equal to 609 meters per hour or 609 VAM.