For the 2001, 2006 and 2013 Censuses of New Zealand, respondents could choose to complete their census questionnaire online. The census was scheduled on 8 March 2011. However, it was cancelled due to the September 2010 and February 2011 Canterbury earthquake. The 1931 census was also cancelled due to the effects of the Great Depression, and was the 1941 census due to the Second World War.