Year	Billions of British Pounds
1960-01-01	4.517
1961-01-01	5.090
1962-01-01	5.230
1963-01-01	5.630
1964-01-01	6.645
1965-01-01	7.197
1966-01-01	7.687
1967-01-01	8.336
1968-01-01	9.548
1969-01-01	10.176
1970-01-01	12.299
1971-01-01	13.829
1972-01-01	15.446
1973-01-01	18.647
1974-01-01	21.114
1975-01-01	23.618
1976-01-01	27.076
1977-01-01	30.886
1978-01-01	37.062
1979-01-01	46.007
1980-01-01	52.043
1981-01-01	54.178
1982-01-01	59.421
1983-01-01	65.436
1984-01-01	74.255
1985-01-01	82.317
1986-01-01	88.348
1987-01-01	104.632
1988-01-01	126.593
1989-01-01	148.884
1990-01-01	156.632
1991-01-01	148.178
1992-01-01	141.848
1993-01-01	143.399
1994-01-01	147.832
1995-01-01	153.304
1996-01-01	168.531
1997-01-01	165.091
1998-01-01	177.509
1999-01-01	184.709
2000-01-01	195.840
2001-01-01	198.659
2002-01-01	208.349
2003-01-01	214.162
2004-01-01	222.779
2005-01-01	238.414
2006-01-01	254.785
2007-01-01	275.664
2008-01-01	270.878
2009-01-01	237.187
2010-01-01	245.284
2011-01-01	255.410
2012-01-01	267.032
2013-01-01	281.407
2014-01-01	305.747
2015-01-01	319.432
2016-01-01	331.442
2017-01-01	350.689