But the new report also projects that tax revenue will climb far more slowly over the next few years.
The same report projected that the figure is likely to rise to 60% (4.9 billion) by 2030.
Roughly a third of them would use those benefits, the report projected, at a cost of about $2.5 million a year to the state.
Its report projected the cost of child poverty by analyzing the impact on future earnings.
The report also projected the tax revenues from decriminalization, by state.
That statistic will rise to 75 percent by the year 2000, the report projected.
The report projected that the final cost for the complete system would be $65.2 to $81.4 billion (2008).
The report projected that cost at $1.8 billion a year.
Market analysts had estimated that the report would project a harvest of 1.48 billion bushels.
The report projected the current budget's structural deficit - the extent to which its numbers do not add up - at $200 million.