Third, the approach allow's the interdependencies between the different sectors to be explicitly modelled, to the extent that data permit. It compares rates of change of value added and employment in ocean-based industries betw'een 2010 and 2030. The compound annual growth rate for value added of the ocean-based industries combined between 2010 and 2030 is estimated at 3.45%, broadly in line with the anticipated compound annual growth rate for value added of the global economy. However, the total growth of employment (approximately 30%) in the ocean-based industries over the 20-year period is expected to outpace markedly the overall growth rate of the global workforce (approximately 20%).