Year	Billions of British Pounds
1960-01-01	17.219
1961-01-01	18.158
1962-01-01	19.285
1963-01-01	20.541
1964-01-01	22.036
1965-01-01	23.562
1966-01-01	25.041
1967-01-01	26.493
1968-01-01	28.738
1969-01-01	30.736
1970-01-01	33.736
1971-01-01	37.951
1972-01-01	43.242
1973-01-01	49.948
1974-01-01	58.428
1975-01-01	71.973
1976-01-01	84.375
1977-01-01	96.792
1978-01-01	111.939
1979-01-01	133.316
1980-01-01	156.110
1981-01-01	176.061
1982-01-01	194.564
1983-01-01	214.911
1984-01-01	231.992
1985-01-01	254.056
1986-01-01	280.579
1987-01-01	308.361
1988-01-01	347.421
1989-01-01	380.557
1990-01-01	413.649
1991-01-01	441.670
1992-01-01	463.384
1993-01-01	493.110
1994-01-01	517.510
1995-01-01	544.028
1996-01-01	583.595
1997-01-01	622.894
1998-01-01	655.999
1999-01-01	691.071
2000-01-01	728.049
2001-01-01	757.499
2002-01-01	791.259
2003-01-01	828.629
2004-01-01	868.007
2005-01-01	912.746
2006-01-01	953.679
2007-01-01	997.279
2008-01-01	1031.499
2009-01-01	1009.980
2010-01-01	1034.557
2011-01-01	1066.404
2012-01-01	1105.928
2013-01-01	1152.357
2014-01-01	1198.609
2015-01-01	1235.481
2016-01-01	1292.590
2017-01-01	1343.792