<Tr> <Th_colspan="2"> Route information </Th> </Tr> <Tr> <Td_colspan="2"> Maintained by SCDOT </Td> </Tr> <Tr> <Th> Length </Th> <Td> 198.8 mi (319.9 km) </Td> </Tr> <Tr> <Th> Existed </Th> <Td> 1968--present </Td> </Tr>

How many exits are there in south carolina