<Table> Crisis in Venezuela <Tr> <Td_colspan="2"> Top to bottom, left to right: Protesters confront the People's Guard at Plaza Francia on 18 March 2014 . Empty store shelves in a Venezuelan store . Millions of Venezuelans protest in Caracas on 26 October 2016 . Venezuelans queued to enter a store . </Td> </Tr> <Tr> <Th> Date </Th> <Td> 2012--ongoing </Td> </Tr> <Tr> <Th> Location </Th> <Td> Venezuela </Td> </Tr> <Tr> <Th> Cause </Th> <Td> Economic policy, crime, corruption, economic downturn, shortages and political conflict . </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Top to bottom, left to right: Protesters confront the People's Guard at Plaza Francia on 18 March 2014 . Empty store shelves in a Venezuelan store . Millions of Venezuelans protest in Caracas on 26 October 2016 . Venezuelans queued to enter a store . </Td> </Tr> <Tr> <Th> Date </Th> <Td> 2012--ongoing </Td> </Tr> <Tr> <Th> Location </Th> <Td> Venezuela </Td> </Tr>

How long has the venezuelan crisis been going on