original  improved                        
51.1            52.6          
52.0            52.0          
53.6            51.2          
50.4            52.5          
52.1            51.5          
53.0            52.1          
51.0            51.6          
50.3            51.4          
51.0            52.3          
52.0            54.0          
50.8                          
53.0                          
54.0                          
52.0                          
56.8                          
55.0                          
53.1                          
56.3                          
56.0                          
53.7                          
50.2                          
52.1                          
52.2                          
54.0                          
53.4                          
54.2                          
54.3