   From  :    To
         :   2500000   2300000   2100000   1900000   1600000   1300000 
  2500000:         0       983       697       581       382       182 
  2300000:       987         0      5415      3555       464       205 
  2100000:       833      5480         0      7941       639       296 
  1900000:       497      3500      8074         0      1399       857 
  1600000:       236       386       630      1517         0      3965 
  1300000:       272       277       373       733      3850         0 
