 | 전세계 청각장애인 4억 6,600만명 |
| there are 466 million persons in the world with disabling hearing loss (6.1% of the world's population) 432 million (93%) of these are adults (242 million males, 190 million females) ... Approximately one-third of persons over 65 years are affected by disabling hearing loss. |
 | 전세계 청각장애인 문맹률 80% 80% of 466 million Deaf people are illiterate or semi-literate. |
