<P> The following statistics reflect the years each political party has controlled a majority across both the Senate and House of Representatives and White House concurrently over the past 100 years (1916--2015). </P> <Table> <Tr> <Td> Party </Td> <Td> Years in Control </Td> </Tr> <Tr> <Td> Democrats: </Td> <Td> 35 yrs </Td> </Tr> <Tr> <Td> Republicans: </Td> <Td> 16 yrs </Td> </Tr> <Tr> <Td> Neither Party: </Td> <Td> 49 yrs </Td> </Tr> </Table> <Tr> <Td> Party </Td> <Td> Years in Control </Td> </Tr> <Tr> <Td> Democrats: </Td> <Td> 35 yrs </Td> </Tr>

How many years did the democrats control congress