Year	Hours
1995-01-01	1863
1996-01-01	1858
1997-01-01	1864
1998-01-01	1884
1999-01-01	1899
2000-01-01	1904
2001-01-01	1827
2002-01-01	1825
2003-01-01	1815
2004-01-01	1827
2005-01-01	1827
2006-01-01	1808
2007-01-01	1793
2008-01-01	1800
2009-01-01	1764
2010-01-01	1795
2011-01-01	1775