California was host to 55,685 international students last year, more than any other state, the institute reported.
But not a single claim has been paid, the institute reported.
The national annual average household cost would be $236, the Institute reported.
A growing number of American students are studying abroad, the institute also reported.
In addition, 11 million people use illicit drugs, the institute has reported.
The committee report puts the number of heavy cocaine users at 2.4 million, while the institute reported only 662,000.
The institute will report final figures later this month.
The institute originally reported that figure as $349.37 billion but revised it upward.
One success story of the decade that the institute has been reporting on is applesauce.
The Institute reported, as the title suggests, that there is a "coming crisis in citizenship."