Lawrencium Ionization Energy

The Lawrencium Ionization Energy is the energy required to remove from atom one mole of electrons with subsequent production of positively charged ion of Lawrencium.
Lr -> Lr⁺ + e^-
This process can be repeated many times, but the energy cost is increased dramatically. The general equation for the Lawrencium is:
Lr^N+ -> Lr^(N+1)+ + e^-

There is no data about Lawrencium ionization energy