<Tr> <Th> Rank </Th> <Th_colspan="3"> Z, element & symbol </Th> <Th_colspan="5"> Abundance in crust (ppm) by source </Th> <Th> Annual production </Th> </Tr> <Tr> <Th> </Th> <Th> </Th> <Th> </Th> <Th> </Th> <Th> Darling </Th> <Th> Barbalace </Th> <Th> WebElements Science and Technology </Th> <Th> Jefferson Lab </Th> <Th> (2016, tonnes) </Th> </Tr> <Tr> <Td> </Td> <Td> 8 </Td> <Td> oxygen </Td> <Td> </Td> <Td> 466,000 </Td> <Td> 474,000 </Td> <Td> 460,000 </Td> <Td> 467,100 </Td> <Td> 461,000 </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 14 </Td> <Td> silicon </Td> <Td> Si </Td> <Td> 277,200 </Td> <Td> 277,100 </Td> <Td> 270,000 </Td> <Td> 276,900 </Td> <Td> 282,000 </Td> <Td> 7,200,000 </Td> </Tr>

Most abundant non metal in the earth's crust