Toriodal Instances in 10**7 by 10**7 Square
Sample Size = 1,000,000 (for TSP instances up to 1,000 and SUB up to 10,000)
SUB - subtour relaxation lower bound

   10  0.711233
   20  0.712171
   30  0.711130
   40  0.710402
   50  0.709893
   60  0.709608
   70  0.709348
   80  0.709185
   90  0.709053
  100  0.708947
  200  0.708431
  300  0.708279
  400  0.708213
  500  0.708169
  600  0.708128
  700  0.708106
  800  0.708091
  900  0.708076
 1000  0.708066
 2000  0.708024
 3000  0.708004
 4000  0.708005
 5000  0.707994
 6000  0.707998
 7000  0.707996
 8000  0.707989
 9000  0.707987
10000  0.707989