Another less ideological goal was to boost the German economy by stimulating the tourist industry out of its slump from the 1920s. It was quite successful up until the outbreak of World War II. By 1934, over two million Germans had participated in a KdF trip; by 1939 the reported numbers lay around 25 million people.[citation needed] With the outbreak of war in 1939, the organization was mothballed, and several projects, such as the massive Prora holiday resort, were never completed.