<Table> <Tr> <Th_colspan="2"> Hammersmith & City line </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> A Hammersmith & City line train at Hammersmith, the western terminus </Td> </Tr> <Tr> <Th_colspan="2"> Overview </Th> </Tr> <Tr> <Th> Type </Th> <Td> Sub-surface </Td> </Tr> <Tr> <Th> System </Th> <Td> London Underground </Td> </Tr> <Tr> <Th> Stations </Th> <Td> 29 </Td> </Tr> <Tr> <Th> Ridership </Th> <Td> 114.6 million (2011 / 12) passenger journeys </Td> </Tr> <Tr> <Th> Colour on map </Th> <Td> Pink </Td> </Tr> <Tr> <Th> Website </Th> <Td> tfl.gov.uk </Td> </Tr> <Tr> <Th_colspan="2"> Operation </Th> </Tr> <Tr> <Th> Opened </Th> <Td> Infrastructure opened in stages between 1863 and 1902, shown as a separate line on the tube map from 1990 . </Td> </Tr> <Tr> <Th> Depot (s) </Th> <Td> Hammersmith </Td> </Tr> <Tr> <Th> Rolling stock </Th> <Td> S7 Stock (7 carriages per trainset) </Td> </Tr> <Tr> <Th_colspan="2"> Technical </Th> </Tr> <Tr> <Th> Line length </Th> <Td> 25.5 km (15.8 mi) </Td> </Tr> <Tr> <Th> Track gauge </Th> <Td> 1,435 mm (4 ft 8 ⁄ in) standard gauge </Td> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Th> Transport for London rail lines </Th> </Tr> <Tr> <Td> <Table> <Tr> <Th> London Underground </Th> </Tr> <Tr> <Td> Bakerloo </Td> </Tr> <Tr> <Td> Central </Td> </Tr> <Tr> <Td> Circle </Td> </Tr> <Tr> <Td> District </Td> </Tr> <Tr> <Td> Hammersmith & City </Td> </Tr> <Tr> <Td> Jubilee </Td> </Tr> <Tr> <Td> Metropolitan </Td> </Tr> <Tr> <Td> Northern </Td> </Tr> <Tr> <Td> Piccadilly </Td> </Tr> <Tr> <Td> Victoria </Td> </Tr> <Tr> <Td> Waterloo & City </Td> </Tr> <Tr> <Th> Other lines </Th> </Tr> <Tr> <Td> Docklands Light Railway </Td> </Tr> <Tr> <Td> Tramlink </Td> </Tr> <Tr> <Td> Overground </Td> </Tr> <Tr> <Td> TfL Rail </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table> </Td> </Tr> </Table> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Hammersmith & City line </Th> </Tr>

When was the hammersmith and city line built