Process started in Europe in 1999, allowing Mexican students to study abroad and pursue a master's degree after Licenciatura, or a Doctoral degree after Maestría. Unlike other OECD countries, the majority of Mexico's public universities do not accredit part-time enrollment programs. Undergraduate studies Undergraduate studies normally last at least 4 years, divided into semesters or quarters, depending on the college or university, and lead to a bachelor's degree (Licenciatura). According to OECD reports, 23% of Mexicans aged 23–35 have a college degree. Although in theory every graduate of a Licenciatura is a Licenciate (Licenciado, abbreviated Lic.) of his or her profession, it is common to use different titles for common professions such as Engineering and Architecture. Engineer, Ingeniero, abbreviated Ing. Electrical Engineer, Ingeniero Eléctrico Electronics Engineer, Ingeniero Electrónico Mechanical Engineer, Ingeniero Mecánico Computer Systems Engineer, Ingeniero en Sistemas Computacionales, abbreviated I.S.C. Architect, Arquitecto, abbreviated Arq. Licenciate, any degree, especially those from social sciences, Licenciado, abbreviated Lic. Postgraduate studies New regulations since 2005 divide postgraduate studies at Mexican universities and research centers in two main categories: Targeted at professional development Especialización. A 1-year course after a bachelor's degree (Licenciatura), which awards a Specialization Diploma (Diploma de Especialización). Maestría. A 2-year degree after a bachelor's degree (Licenciatura), which awards the title of Master (Maestro). Targeted at scientific research Maestría en Ciencias. A 2-year degree after a bachelor's degree (Licenciatura), which awards the title of Master of Science (Maestro en Ciencias). Doctorado. A 3-year degree after a master's degree (either Maestría or Maestría en Ciencias), or a 4-year degree directly after the bachelor's degree (Licenciatura) for high-achieving students. The Doctor of Sciences degree (Doctor en Ciencias) is equivalent to the higher doctorate awarded in countries such as Denmark, Ireland, the UK, and the former USSR countries. Intercultural Universities Intercultural Universities in Mexico were established in 2004 in response to the lack of enrollment of the indigenous population in the country. While an estimated 10% of the population of Mexico is indigenous, it is the least represented in higher education. According to estimates, only between 1% and 3% of higher education enrollment in Mexico is indigenous. In response to this inequality, the General Coordination for Intercultural and Bilingual Education at the Ministry of Education established Intercultural Universities with the active participation of indigenous organizations and academic institutions in each region. International education , the International Schools Consultancy (ISC) listed Mexico as having 151 international