<Tr> <Td> </Td> <Td> 30.7% 49,798 </Td> <Td> 56.6% 91,667 </Td> <Td> 12.7% 20,523 </Td> </Tr> <Tr> <Td> </Td> <Td> 37.0% 56,479 </Td> <Td> 62.5% 95,425 </Td> <Td> 0.50% 671 </Td> </Tr> <Tr> <Td> 1984 </Td> <Td> 46.5% 68,602 </Td> <Td> 53.2% 78,625 </Td> <Td> 0.30% 435 </Td> </Tr> <Tr> <Td> 1980 </Td> <Td> 42.9% 51,233 </Td> <Td> 54.9% 65,571 </Td> <Td> 2.14% 2,559 </Td> </Tr>

Was there oil in the rio grande valley