1985 - around 52kg (bodyfat would have been under 10% I'd say)
1993 - around 75kg (heaviest)
2000 - ~72kg for the next 10 years
2011- 73kgs 16% BF and trying to add 2-3kgs of pure muscle only this year, while maybe nipping 1% off the BF.
So about 20kgs+ in the last 25 years, about 15kgs of that is muscle.