......................................................41 6.3 ................................................42 6.3.1 ................................42 6.3.2 ....................................43 6.3.3 ....................................................43 6.3.4 ................................................44 .................................................................................................45 .........................................................................................................46 ......................................................................48 .............................................................................................................49 1 1.1 18 1712 1781 1859 1885 1886 1 29 1894 velo 1.1.1 1 2 1997140 2 8 33% 10% 2009 3 20 90