Girls' equal access to education has been achieved in some countries, but there are significant disparities in the majority. There are gaps in access between different regions and countries and even within countries. Girls account for 60 per cent of children out of school in Arab countries and 66 per cent of non-attendees in South and West Asia; however, more girls than boys attend schools in many countries in Latin America, the Caribbean, North America and Western Europe.[44] Research has measured the economic cost of this inequality to developing countries: Plan International’s analysis shows that a total of 65 low, middle income and transition countries fail to offer girls the same secondary school opportunities as boys, and in total, these countries are missing out on annual economic growth of an estimated $92 billion.[44]