Table 1 The number of vowels (V No) in orthographic (Ortho) and pronounced (Prono) words and the difference (Diff) between them

V No	1	2	3	4	5	6	7	8
Ortho	221,200	45,424	11,567	3,389	810	89	15	1
Prono	222,038	44,338	9,890	2,803	522	54	15
Diff	838	-1,086	-1,677	-586	-288	-35	0	-1