I assume you were asking about my information on wood ties.
The source was Crossties, the magazine published by the Railway Tie Association.
Most recent year for which I have information is 2010:
Ties laid in replacement on BNSF:
Wood: 3,158,823
Concrete: 168,319
Other: 33,547
2009 was very close to the same, Below is for 2009:
Ties laid in replacement on BNSF:
Wood: 3,116,404
Concrete: 154,906
Other: 12,000
I wouldn't bother with a letter to Matt Rose. I am sure that he knows what is happening in this area. I am also certain that whether and where to use concrete ties has been thoroughly analyzed by people that know far more about the subject than anyone here.