{"Year":1979,"Extent":7.22,"Area":4.54,"t":1}
{"Year":1980,"Extent":7.86,"Area":4.83,"t":2}
{"Year":1981,"Extent":7.25,"Area":4.38,"t":3}
{"Year":1982,"Extent":7.45,"Area":4.38,"t":4}
{"Year":1983,"Extent":7.54,"Area":4.64,"t":5}
{"Year":1984,"Extent":7.11,"Area":4.04,"t":6}
{"Year":1985,"Extent":6.93,"Area":4.18,"t":7}
{"Year":1986,"Extent":7.55,"Area":4.67,"t":8}
{"Year":1987,"Extent":7.51,"Area":5.61,"t":9}
{"Year":1988,"Extent":7.53,"Area":5.32,"t":10}
{"Year":1989,"Extent":7.08,"Area":4.83,"t":11}
{"Year":1990,"Extent":6.27,"Area":4.51,"t":12}
{"Year":1991,"Extent":6.59,"Area":4.47,"t":13}
{"Year":1992,"Extent":7.59,"Area":5.38,"t":14}
{"Year":1993,"Extent":6.54,"Area":4.53,"t":15}
{"Year":1994,"Extent":7.24,"Area":5.09,"t":16}
{"Year":1995,"Extent":6.18,"Area":4.39,"t":17}
{"Year":1996,"Extent":7.91,"Area":5.6,"t":18}
{"Year":1997,"Extent":6.78,"Area":4.85,"t":19}
{"Year":1998,"Extent":6.62,"Area":4.26,"t":20}
{"Year":1999,"Extent":6.29,"Area":4.24,"t":21}
{"Year":2000,"Extent":6.36,"Area":4.32,"t":22}
{"Year":2001,"Extent":6.78,"Area":4.56,"t":23}
{"Year":2002,"Extent":5.98,"Area":3.99,"t":24}
{"Year":2003,"Extent":6.18,"Area":4.02,"t":25}
{"Year":2004,"Extent":6.08,"Area":4.36,"t":26}
{"Year":2005,"Extent":5.59,"Area":4.04,"t":27}
{"Year":2006,"Extent":5.95,"Area":3.98,"t":28}
{"Year":2007,"Extent":4.32,"Area":2.79,"t":29}
{"Year":2008,"Extent":4.73,"Area":3.22,"t":30}
{"Year":2009,"Extent":5.39,"Area":3.72,"t":31}
{"Year":2010,"Extent":4.93,"Area":3.29,"t":32}
{"Year":2011,"Extent":4.63,"Area":3.18,"t":33}
{"Year":2012,"Extent":3.63,"Area":2.37,"t":34}
{"Year":2013,"Extent":5.35,"Area":3.75,"t":35}
{"Year":2014,"Extent":5.29,"Area":3.7,"t":36}
{"Year":2015,"Extent":4.68,"Area":3.37,"t":37}