<Tr> <Th> Weight </Th> <Td> Approx. 1 g </Td> </Tr> <Tr> <Th> Security features </Th> <Td> Watermark, Security thread, EURion constellation, Color - shifting ink, Micro-printing </Td> </Tr> <Tr> <Th> Paper type </Th> <Td> 75% cotton 25% linen </Td> </Tr> <Tr> <Th> Years of printing </Th> <Td> 1861--present </Td> </Tr>

When did they change the 50 dollar bill