   From  :    To
         :   2500000   2300000   2100000   1900000   1600000   1300000 
  2500000:         0      1314      1009       546       342       179 
  2300000:      1291         0      7279      2671       440       197 
  2100000:      1133      7424         0      5439       676       292 
  1900000:       449      2489      5651         0      1493       820 
  1600000:       259       376       651      1521         0      3400 
  1300000:       257       275       374       725      3256         0 
