<Tr> <Td> Mountain West Airlines - Idaho </Td> <Td> 1981 - 03 - 06 March 6, 1981 </Td> <Td> </Td> <Td> Ceased operations </Td> </Tr> <Tr> <Td> LANICA </Td> <Td> 1981 - 03 - 16 March 16, 1981 </Td> <Td> </Td> <Td> Nicaraguan airline; ceased operations </Td> </Tr> <Tr> <Td> Coral Air </Td> <Td> 1981 - 07 - 13 July 13, 1981 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> Pacific Coast Airlines </Td> <Td> 1981 - 09 - 11 September 11, 1981 </Td> <Td> </Td> <Td> </Td> </Tr>

How many airlines have filed for bankrupcy since 1999