1943 ȿ Ͽ 1974 ϳ 1978 θ 1982 ߾ӱȸ ôϿ. 1986 ȼ 1993 ̱ ũî ̽ б йڻ , 1996 ̱ ŷ б ȸйڻ Ҵ. 1990~ ص, Ƽƹ, ȣ, þ, ʸ ۳Ʈũ(GCN) ǰ ִ. 1993~2006 ̱ ũî 50 ȸ Ͽ. ̱ , Ƽ, , LA, Ͽ, Ϻ, źڴϾ, ƸƼ, 찣, Űź, ɳ, ʸ, µζ, ε, þ, , , , մ뼺ȸ εϿ, ؿ մ뼺ȸ ε ְ ﰭ ڸűϿ. 2006 ϱ 10 ؿ 5,000 ȸ ΰ ֿ䵵ÿ 49 ȸ ̱, ij, Ϻ, þ, ߱, 븸, ʸ, , , , ε, εþ, ī, ؿ 22 107 縦 ļߴ. ϰ ѱϺ, ߾Ϻ, Ź, ѰܷŹ, û紺, ȭϺ, ѱŹ, ũîŹ, ȭŹ žĮ ǰ 41 ⰣϿ 18 ǰ ִ. ߾ӱȸ ȸ, ռᱳȸ ȸ, ռб ̻, ȭ Ź , ο̼ , ۳Ʈũ(GCN) ̻, ǻƮũ(WCDN) ̻ ϰ ִ.