Copyright-free (著作権フリー) is a conventional expression extensively used in Japan that the author say their works can be used freely regardless of copyright. It is distinguished from public domain.
... from 45 to 64, and 9.6% who are 65 years of age or older. The median age is 35 years. For every 100 females there are 96.9 males. For every 100 females age 18 and ...