0: 0
1: 0.392156862745098
2: 0.784313725490196
3: 1.17647058823529

...

127: 49.8039215686275
128: 50.1960784313725
129: 50.5882352941176

...

252: 98.8235294117647
253: 99.2156862745098
254: 99.6078431372549
255: 100