<Tr> <Td> 1980 </Td> <Td> 1981 </Td> <Td> 1982 </Td> <Td> </Td> <Td> 1984 </Td> <Td> 1985 </Td> <Td> 1986 </Td> <Td> </Td> <Td> 1988 </Td> <Td> 1989 </Td> </Tr> <Tr> <Th> 1990s </Th> <Td> <Table> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 1997 </Td> <Td> 1998 </Td> <Td> 1999 </Td> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 1997 </Td> <Td> 1998 </Td> <Td> 1999 </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> 1997 </Td> <Td> 1998 </Td> <Td> 1999 </Td> </Tr>

What are the qualifications to be a nba player