x1     x2    x3    x4      y
18.00   27.8   96.0  1011.7  708.1 
27.75   26.9   69.3  944.0   608.2 
8.00    34.5   14.4  976.9   537.7  
25.30   31.3   93.3  958.7   568.6
18.00   28.4   59.8  871.4   609.3  
24.80   33.4   34.6  859.2   593.0  
21.70   25.7   98.7  927.9   626.7   
19.50   37.0   15.6  954.5   651.5 
18.00   35.0  169.9  832.8   568.0   
10.50   41.3   38.6  863.2   620.0  
22.00   36.1   87.6  925.0   574.9  
18.88   26.2   63.8  871.2   618.8  
25.00   45.4   21.2  987.5   564.6  
23.25   38.2  113.3  726.7   365.4 
23.00   35.9    6.1  910.7   636.5  
27.10   29.2  103.1  919.0   623.3  
20.00   51.8    1.5  737.2   279.6  
23.00   31.4   86.8  901.0   645.2 
14.50   31.5  120.6  942.5   589.5   
28.00   31.3  124.8  853.4   559.5 
7.50    30.1  117.6  852.5   712.7  
17.00   28.1  112.9  799.8   641.1 
16.00   32.2    4.3  849.0   446.4  
24.00   30.0   64.5  931.8   522.7 
25.00   27.1   47.1  890.8   530.0  
30.00   33.3  120.7  849.2   508.0
19.00   34.4  138.8  796.3   511.3  
30.00   33.7    6.5  868.0   437.3
18.00   30.1   95.6  875.6   645.8  
16.00   27.2   66.2  892.4   715.3  
20.70   30.6  114.0  855.1   642.8  
22.00   30.9   83.9  926.8   641.7  
24.00   30.8  135.5  918.5   520.0  
21.40   30.0   90.5  919.5   639.5  
18.50   27.7   78.0  865.5   648.0    
20.00   30.2  304.2  851.8   658.1  
20.00   27.6   60.9  878.5   637.3   
24.50   26.6   43.6  887.0   552.8 
26.00   30.6   22.8  928.2   652.8  
20.00   32.8   14.4  1106.9  666.2  
23.50   39.2   31.0  850.8   603.3  
17.50   35.5   72.0  870.2   652.0  
21.00   41.8   35.9  902.5   544.4   
31.00   35.3   83.4  940.2   529.9  
19.00   32.0  121.5  900.0   609.9  
27.00   25.9   37.0  896.8   555.0  
20.00   35.9  132.0  761.0   640.8   
29.90   32.2  114.1  907.4   558.1  
18.40   24.7   74.2  870.3   698.0  
14.00   34.3   27.7  934.0   741.1  
17.00   30.6  125.8  901.5   672.3