Year	Billions of British Pounds
1960-01-01	4.469
1961-01-01	4.751
1962-01-01	5.056
1963-01-01	5.082
1964-01-01	5.419
1965-01-01	6.110
1966-01-01	6.646
1967-01-01	7.334
1968-01-01	7.812
1969-01-01	8.209
1970-01-01	9.242
1971-01-01	10.530
1972-01-01	12.016
1973-01-01	13.752
1974-01-01	17.047
1975-01-01	23.518
1976-01-01	27.523
1977-01-01	29.989
1978-01-01	33.961
1979-01-01	39.456
1980-01-01	49.636
1981-01-01	56.051
1982-01-01	61.006
1983-01-01	66.093
1984-01-01	69.993
1985-01-01	73.063
1986-01-01	78.946
1987-01-01	84.937
1988-01-01	91.597
1989-01-01	99.577
1990-01-01	110.216
1991-01-01	121.512
1992-01-01	129.550
1993-01-01	132.302
1994-01-01	137.497
1995-01-01	142.496
1996-01-01	148.170
1997-01-01	150.596
1998-01-01	156.926
1999-01-01	167.984
2000-01-01	179.353
2001-01-01	193.630
2002-01-01	211.405
2003-01-01	232.125
2004-01-01	251.811
2005-01-01	268.937
2006-01-01	285.491
2007-01-01	296.670
2008-01-01	316.215
2009-01-01	331.134
2010-01-01	337.275
2011-01-01	338.323
2012-01-01	345.028
2013-01-01	346.587
2014-01-01	357.101
2015-01-01	361.028
2016-01-01	367.974
2017-01-01	372.750