However, as we compare with 2019-20 data, we see that there has been an increase since 2004-06 in all age groups, except those aged 65 or older.
Er hyn, bu cynnydd ers 2004-06 ym mhob grŵp oedran, ac eithrio’r rhai 65 oed neu hŷn, wrth gymharu â data 2019-20.