Formaldehyde and boiling points

Hi guys. I'm looking for boiling points of solutions with Formadehyde and Water.

I found on ilo.org (http://www.ilo.org/public/english/protection/safework/cis/products/icsc/dtasht/_icsc06/icsc0695.htm) the boiling point of the solution Formaldehyde 37% (and the rest Water), it's 98 Degrees Celcius.

I would like to know the boiling point of a solution with Formaldehyde 37%, Methanol 1% (and the rest water), as well as of the Formaldehyde 26% or Formaldehyde 23% (and the rest water).

You need to have the boiling point elevation constant $$K_{b}$$ for formaldehyde I believe.
$$\Delta$$$$T_{b}$$ = i $$K_{b}$$ M