<Tr> <Th> Event </Th> <Th> German gold marks (billions) </Th> <Th> U.S. dollars (billions) </Th> <Th> 2018 US $(billions) </Th> </Tr> <Tr> <Td> Initial German offer, 24 April 1921 </Td> <Td> 50 (capital value) or 200 in annuities (nominal value) </Td> <Td> 12.5--50 </Td> <Td> 172--664 </Td> </Tr> <Tr> <Td> London Schedule of Payments, 5 May 1921 </Td> <Td> 132 </Td> <Td> 33 </Td> <Td> 439 </Td> </Tr> <Tr> <Td> A and B Bonds, of the above payment scheme </Td> <Td> 50 </Td> <Td> 12.5 </Td> <Td> 166 </Td> </Tr>

When did germany pay off its ww1 debt