The total trunk and branch volume of Sweden's forests has risen by more than 1.2bn cubic metres since the mid-fifties

Five-year average

Excluding formally protected areas

Including formally protected areas

2.0

2.4

2.8

3.2

3.6bn

1960

1970

1980

1990

2000

2010

Guardian graphic. Source: The Swedish National Forest Inventory, Swedish University of Agricultural Sciences. Note: Volume includes dead and fallen trees which can still be used for fibre or fuel, and excludes small branches, twigs and foliage