membrane	strength				
1		95.5				
1		103.2				
1		93.1				
1		89.3				
1		90.4				
1		92.1				
1		93.1				
1		91.9				
1		95.3				
1		84.5				
2		90.5				
2		98.1				
2		97.8				
2		97				
2		98				
2		95.2
2		95.3
2		97.1
2		90.5
2		101.3
3		86.3
3		84
3		86.2
3		80.2
3		83.7
3		93.4
3		77.1
3		86.8
3		83.7
3		84.9
4		89.5
4		93.4
4		87.5
4		89.4
4		87.9
4		86.2
4		89.9
4		89.5
4		90
4		95.6