22 52 12 3000 2500 2000 1500 (km 2 ) 1000 500 0 1947 1955 1977 1985 1989 1994 2000 22 30 52 60 6 12 2000
1947 2000 110 100 90 (km 2 ) 30 20 10 1947 2000 0 ()
( 10 20 () 30 40 50 60 60
a b b c c a
B A B C C A A A B C B C
100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 2002 2002 120 100% 140,000 100% 90% 90% 100 120,000 80% 80% 0 KP16.2 KP6.7 KP2.6 80 60 40 20 10 6 m 3 / 70% 60% 50% 40% 30% 20% 10% 0% KP16.2 KP6.7 KP2.6 100,000 80,000 60,000 40,000 20,000 % 100 90 80 70 60 50 40 30 20 10 0 61 39 39 61 0 kg/ 87 83 13 17 70% 60% 50% 40% 30% 20% 10% 0% 2002 0 KP16.2 KP6.7 KP2.6 14,000 12,000 10,000 8,000 6,000 4,000 2,000 kg/