In contrast, in Argentina and Ireland, where vocational programmes are not offered at all at this level, as well as in Brazil, Canada and India, more than 90% of upper secondary students are enrolled in general programmes (Table B1.3). These include apprenticeship programmes that involve concurrent school-based and work-based training, as well as programmes that involve alternating periods of attendance at educational institutions and participation in work-based training (see Definitions section at the end of this indicator). On average across the OECD, 11% of students in upper secondary education are enrolled in this type of programme, although they are offered in and data are available for only 21 OECD countries. In Hungary and Latvia, all vocational programmes are combined school- and work-based programmes.