Percentage of total Australian workforce International representation in the Australian workforce between 1991 and 2031 75% 70% 65% 60% 55% 50% 45% 40% 35% 30% 25% 20% 15% 10% 5% 1.6% 2.2% 0% 71.5% 1991 63.4% 16.2% 14.7% 9.8% 6.8% 6.9% 3.2% 3.9% 4.8% 3.6% 3.1% 2011 49.9% 2031 18.7% 16.6% 3.1% If the total size of the Australian workforce was 11 million in 2011 and is projected to grow to 17 million in 2031, what would we expect the percentage increase in the number of workers of African origin during this time to be? Please state your answer to two decimal places.