<P> Provincial wings of the NDP form government in Alberta and British Columbia currently, since 2015 and 2017 respectively . Previously, provincial or territorial wings of the party or its CCF predecessor have also formed governments in Nova Scotia (2009--2013), Ontario (1990--1995), Saskatchewan (1944--1964, 1971--1982, 1991--2007), Manitoba (1969--1977, 1981--1988, 1999--2016), British Columbia (1972--1975, 1991--2001) and Yukon (1985--1992, 1996--2000). </P> <P> The federal and provincial (or territorial) level NDPs are more integrated than other political parties in Canada, and have shared membership . </P> <P> The NDP has often been Canada's third or fourth largest party in Parliament, at times aligning itself with the Liberal Party of Canada, as it did during the minority government of Lester B. Pearson from 1963 to 1968, Pierre Trudeau from 1972 to 1974, and Paul Martin from 2004 to 2006 . Following the 1993 federal election the NDP was reduced to fourth place behind the Bloc Québécois, a position it would maintain for most of the next two decades . In the 2011 federal election under the leadership of Jack Layton, the NDP won the second-most seats in the House of Commons, gaining the position of Official Opposition for the first time in the party's history . The NDP then lost 59 seats during the 2015 federal election and fell to third place in Parliament, though it is their second best seat count to date . </P> <Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (June 2011) (Learn how and when to remove this template message) </Td> </Tr> </Table>

When was the last time the ndp were in power
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