% N2 & cell size \\
43.86 & 4.0 \\
53.40 & 7.3 \\
59.32 & 11.6 \\
63.91 & 16.0 \\
65.22 & 22.4 \\
67.57 & 24.2 \\
69.62 & 30.4 \\
71.43 & 32.0 \\
73.03 & 38.5 \\
74.47 & 47.8 \\