He raised $1.8 million through June, with at least 19 percent coming from large contributions.
The state of Texas has agreed to provide $850 million and $1.75 billion will come from foreign contributions, they said.
About $4.8 million was raised for the fund from private contributions.
About half the estimated amount is to come from foreign contributions.
Between 1991 and 1996, its income from contributions was estimated at $20 million per year.
The balance - less than half the amount - came from public and private contributions.
More than 80 percent of the fund's operating budget comes from individual contributions.
But the figure represented a drop of more than 12 percent from the previous year's contributions.
The capital can come from contributions of cash or other assets.
"The numbers remain consistent, but the level of income from contributions goes down."
