<Tr> <Td> 13 </Td> <Td> Nigeria (OPEC) </Td> <Td> 1,999,885 </Td> <Td> 10,752 </Td> </Tr> <Tr> <Td> 14 </Td> <Td> Angola (OPEC) </Td> <Td> 1,769,615 </Td> <Td> 61,417 </Td> </Tr> <Tr> <Td> 15 </Td> <Td> Norway </Td> <Td> 1,647,975 </Td> <Td> 313,661 </Td> </Tr> <Tr> <Td> 16 </Td> <Td> Kazakhstan </Td> <Td> 1,595,199 </Td> <Td> 88,686 </Td> </Tr>

Which of these countries is the fourth biggest supplier of oil to the u.s