The only comparable data on a global scale are on the date of suffrage and the percentage of female seats in parliament, which provide a very limited overview of gender disparities in politics. Because data on conventional forms of political participation (such as voting trends) are not available due to secret ballot systems, and as a result of the difficulty of capturing unconventional forms of political participation, such as protesting, with quantitative methods, it is very difficult to measure other forms of women’s political participation. A similar issue arises when using data on education.