Year constant LCU 1977 23260000 1978 24360000 1979 25190000 1980 23180000 1981 25890000 1982 25340000 1983 21480000 1984 21620000 1985 23170000 1986 20850000 1987 21780000 1988 22940000 1989 22100000 1990 21590000 1991 22830000 1992 23870000 1993 24660000 1994 25570000 1995 21100000 1996 23460000 1997 24100000 1998 23960000 1999 22440000 2000 15220000 2001 17930000 2002 21440000 2003 21760000 2004 24540000 2005 25870000 2006 20680000 2007 21350000 2008 22550000 2009 20160000 2010 20660000 2011 23630000 2012 21660000 2013 20970000 2014 21100000 2015 20680000 2016 18870000 2017 20560000 2018 20810000 2019 20570000 2020 20820000 2021 22640000 2022 20520000 2023 26260000