Relative variations in changeability, robustness, and nonsense robustness of deviant codes compared with those of SGC. The values are given by (v′ − v)/v [(v − v′)/v for s-robustness], where v′ is the value of a deviant code, and v is a value of SGC. The deviant codes are referred to by the abbreviations listed in Table 2, and are classified according to the manner of improvement.