<Tr> <Td> 1942 </Td> <Td> 661,800 </Td> <Td> 1,095,800 </Td> <Td> − 434,000 </Td> <Td> 5,942,600 </Td> <Td> 93 </Td> </Tr> <Tr> <Td> 1943 </Td> <Td> 1,067,100 </Td> <Td> 2,065,700 </Td> <Td> − 998,600 </Td> <Td> 4,494,400 </Td> <Td> 77 </Td> </Tr> <Tr> <Td> 1944 </Td> <Td> 1,735,100 </Td> <Td> 4,115,100 </Td> <Td> − 2,380,000 </Td> <Td> 2,564,000 </Td> <Td> 40 </Td> </Tr> <Tr> <Td> 1 / 45--8 / 45 </Td> <Td> 465,000 </Td> <Td> 1,562,100 </Td> <Td> − 1,097,100 </Td> <Td> 1,466,900 </Td> <Td> 23 </Td> </Tr>

How many subs are in the us navy