 Complete the following phrase:  In 1974 the Whitlam government then performed a nationwide opinion survey to determine the song to be sung on occasions of national significance. Conducted through the Australian Bureau of Statistics, the survey polled 60,000 people nationally. Advance Australia Fair was chosen by 51.4 of respondents and, on 9 April of that year, Whitlam announced in parliament that it was the national anthem. It was to be used on all occasions excepting those of a specifically regal nature. A spokesman for Whitlam later stated that the Government regarded the tune primarily as the national anthem. During the 1975 election campaign following the 