<Tr> <Th> 7 </Th> <Td> </Td> <Td> George W. Ball </Td> <Td> June 26, 1968--September 25, 1968 </Td> </Tr> <Tr> <Th> 8 </Th> <Td> </Td> <Td> James Russell Wiggins </Td> <Td> October 7, 1968--January 20, 1969 </Td> </Tr> <Tr> <Th> 9 </Th> <Td> </Td> <Td> Charles Yost </Td> <Td> January 23, 1969--February 25, 1971 </Td> <Td> Richard Nixon </Td> </Tr> <Tr> <Th> 10 </Th> <Td> </Td> <Td> George H.W. Bush </Td> <Td> March 1, 1971--January 18, 1973 </Td> </Tr>

How much does the u.s. ambassador to the united nations make