<Tr> <Td> </Td> <Td> Mike McCarthy </Td> <Td> XLV </Td> <Td> Arlington, Texas </Td> <Td> Pittsburgh Steelers </Td> <Td> 31--25 </Td> <Td> 10--6 </Td> </Tr> <Tr> <Td_colspan="5"> Total Super Bowls won: </Td> <Td_colspan="2"> 4 </Td> </Tr> <P> The Packers have won three NFC Championship Games . NFC Championships did not exist until after the AFL - NFL merger in 1970 . </P> <Table> <Tr> <Th> Year </Th> <Th> Coach </Th> <Th> Location </Th> <Th> Opponent </Th> <Th> Score </Th> <Th> Record </Th> </Tr> <Tr> <Td> </Td> <Td> Mike Holmgren </Td> <Td> Green Bay, Wisconsin </Td> <Td> Carolina Panthers </Td> <Td> 30--13 </Td> <Td> 13--3 </Td> </Tr> <Tr> <Td> 1997 </Td> <Td> Mike Holmgren </Td> <Td> San Francisco, California </Td> <Td> San Francisco 49ers </Td> <Td> 23--10 </Td> <Td> 13--3 </Td> </Tr> <Tr> <Td> </Td> <Td> Mike McCarthy </Td> <Td> Chicago, Illinois </Td> <Td> Chicago Bears </Td> <Td> 21--14 </Td> <Td> 10--6 </Td> </Tr> <Tr> <Td_colspan="4"> Total NFC Championships won: </Td> <Td_colspan="2"> 3 </Td> </Tr> </Table>

How many nfc championships have the packers won