| Code | Definition | Number of Accessions | 
		
			| 1 | very narrow | 76 | 
		
			| 2 | (1= very narrow, 9= very wide) | 347 | 
		
			| 3 | (1= very narrow, 9= very wide) | 330 | 
		
			| 4 | (1= very narrow, 9= very wide) | 347 | 
		
			| 5 | (1= very narrow, 9= very wide) | 358 | 
		
			| 6 | (1= very narrow, 9= very wide) | 324 | 
		
			| 7 | (1= very narrow, 9= very wide) | 228 | 
		
			| 8 | (1= very narrow, 9= very wide) | 54 | 
		
			| 9 | very wide | 41 |