Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the greek national account when 1997 is 6.1?

### Inputs:
table_name: table, 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']

### Response:
SELECT Greek national account FROM table WHERE 1997 = 6.1