=+65. Expensive cities. The Worldwide Cost of Living Survey City Rankings determine the cost of living in the most expensive cities in the world as an index. This index scales New York City as 100 and expresses the cost of living in other cities as a percentage of the New York cost. For example, in 2007, the cost of living index in Tokyo was 122.1, which means that it was 22% higher than New York. The scatterplot shows the index for 2013 plotted against the 2007 index for the 15 most expensive cities of 2007.

60 80 100 120 140 160 Index 2013 95 100 105 110 115 120 125 130 135 Index 2007