user: ### NOW ANSWER:
Question: What is 2003 when 1999 is 2.1?
Columns: ['Greek national account', '1970', '1980', '1990', '1995', '1996', '1997', '1998', '1999', '2000', '2001 1', '2002', '2003', '2004', '2005', '2006', '2007', '2008', '2009', '2010', '2011', '2012', '2013 2', '2014 2', '2015 3']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Public revenue (% of GDP)', 'N/A', 'N/A', '31.0', '37.0', '37.8', '39.3', '40.9', '41.8', '43.4', '41.3', '40.6', '39.4', '38.4', '39.0', '39.2', '40.7', '40.7', '38.3', '40.6', '42.4', '44.7', '43.5', '43.9', 'N/A']
SQL:

assistant: SELECT "2003" FROM "Table" WHERE "1999" = '2.1';