Year	Hours
1995-01-01	1788
1996-01-01	1819
1997-01-01	1827
1998-01-01	1805
1999-01-01	1805
2000-01-01	1800
2001-01-01	1787
2002-01-01	1785
2003-01-01	1776
2004-01-01	1782
2005-01-01	1764
2006-01-01	1741
2007-01-01	1736
2008-01-01	1718
2009-01-01	1674
2010-01-01	1663
2011-01-01	1668