Year,Area,Date of maximum 1979,1.5,1979-09-17 1980,5.0,1980-10-30 1981,3.9,1981-10-10 1982,10.9,1982-10-02 1983,12.7,1983-10-17 1984,14.2,1984-09-25 1985,17.5,1985-10-12 1986,14.9,1986-10-06 1987,22.4,1987-09-29 1988,14.0,1988-09-20 1989,21.8,1989-09-22 1990,20.8,1990-10-03 1991,21.8,1991-10-02 1992,24.0,1992-09-19 1993,22.2,1993-09-21 1994,22.6,1994-09-25 1995,22.9,1995-09-27 1996,24.5,1996-09-07 1997,22.2,1997-10-05 1998,27.0,1998-09-20 1999,25.3,1999-09-15 2000,28.4,2000-09-06 2001,26.1,2001-09-15 2002,18.1,2002-09-18 2003,26.9,2003-09-12 2004,21.5,2004-09-17 2005,25.7,2005-09-19 2006,26.2,2006-09-15 2007,24.0,2007-09-12 2008,26.0,2008-09-13 2009,24.2,2009-09-18 2010,21.8,2010-09-25 2011,24.5,2011-09-17 2012,19.3,2012-09-22 2013,21.9,2013-09-15 2014,22.6,2014-10-01 2015,27.9,2015-10-09 2016,21.8,2016-09-19 2017,18.2,2017-09-30 2018,24.1,2018-09-20 2019,9.4,2019-09-30 2020,24.0,2020-10-07 2021,24.8,2021-09-30 2022,24.5,2022-09-26 2023,26.1,2023-09-16 2024,21.9,2024-09-27