Looking for 10 years of statistics comparing the death rate of
Professional Rugby versus Professional American Football, for the
years 1995 - 2005.  An excel spreadsheet would be perfect

For each year, the following data points are needed:
0)  Year
1)  Total number of deaths in Rugby
2)  Total number of man hours on the rugby field (see calculation below)
3)  Total number of games used for the man hour calculation for Rugby
4)  Total number of deaths in American Football
5)  Total number of man hours on the American Football field (see
calculation below)
6)  Total number of games used for the man hour calculation for American Football

Constraints:
1)  For Rugby, please only use full sided Rugby League in the
following countries: Australia, New Zealand, and the English league. 
DO NOT COUNT sevens.
2)  For American Football, only count the NFL (not Canada)
3)  Feel free to include all playoff and World Cup games
4)  Please cite references where applicable

Man-hours calculation:
Man-hours on the field should be = Total Number of Games X Total
Number of Hours per game X Total Number of Players on the field.

i.e. If all of rugby had 1000 games with 26 players on the field for a
one hour game = 26,000 total man hours

Just a hint on fatalities in American football. At the professional
level it is highly unlikely. A few have occured due to improper
medical/training regime and personnel in very hot-humid Summer weather
in training camps. Not directly related to the game. Most players
susceptible to fatigue/injury have been weeded out at every level from
early school years through college. The hidden data is the impact on
later years. Most pro football players are at risk for earlier death
and dementia by a full decade over others in their demographic.

Rugby, with almost no protective gear, requires more protective skill
than the reckless abandon of American pro football with heavy body
armor.