I think the member is asking how the cost of the bill would be translated in premium payers. A good rule of thumb--rather than doing that calculation per capita--is that an increase in cost of $100 million per year equates to about 1¢ in the premium rate. So as a rough rule of thumb, $2 billion is equal to a 20¢ increase in the premium rate.
On April 1st, 2008. See this statement in context.