The Constitution of the Netherlands guarantees freedom of education, which means that all schools that adhere to general quality criteria receive the same government funding. This includes schools based on religious principles by religious groups. Three out of thirteen political parties in the States General (CDA, CU and SGP) are based upon the Christian belief. Several Christian religious holidays are national holidays (Christmas, Easter, Pentecost, and the Ascension of Jesus). Atheism, Agnosticism, and Christian atheism are on the rise and are widely accepted and considered to be non-controversial. Even among those who adhere to Christianity, there are high percentages of atheists, agnostics, and Ietsists, since affiliation with a Christian denomination is also used in a way of cultural identification in various parts of the Netherlands.