This simulation run uses 2 pumps and the following random number seeds:
         1         2         3         4
  Current Total  NoQueue Car->Car Average Number  Average  Pump    Total  Lost
    Time   Cars Fraction   Time   Litres  Balked    Wait  Usage   Profit Profit
-------------------------------------------------------------------------------
    2000     34   0.160   58.824  35.243     10  145.655  1.058   -17.59   7.56
    4000     80   0.138   50.000  31.894     30  167.541  1.033     1.33  22.46
    6000    119   0.092   50.420  33.504     47  191.596  1.015    22.80  36.88
    8000    160   0.085   50.000  33.043     65  203.135  1.006    42.54  49.63
   10000    203   0.070   49.261  32.140     83  218.650  0.999    60.00  63.12
   12000    237   0.060   50.633  32.911     95  237.113  1.006    83.19  71.80
   14000    268   0.127   52.239  33.125    104  212.268  0.986   103.34  78.60
   16000    308   0.128   51.948  33.089    119  201.210  0.989   127.62  87.17
   18000    345   0.114   52.174  33.295    133  204.471  0.990   148.57  98.60
   20000    407   0.103   49.140  33.307    166  222.616  0.992   172.54 126.36