The 2015 census of Malaysia reported a population of 2,636,000 in Sarawak, making it the fourth most populous state. However, this population is distributed over a large area resulting in Sarawak having the lowest population density in the country with only 20people per km2. Although it has a low population density, the average population growth rate of 1.8%, from 2000 to 2010, is very close to the national average of 2.0%. In 2014, 58% of the population resided in urban areas with the remainder in rural areas, but over the next 10 years it is predicted that the urban population would rise to 65%. , the birth rate in Sarawak was 16.3 per 1000 individuals, the mortality rate was 4.3 per 1000 population, and the Infant mortality was 6.5 per 1000 live births.
Question: How many percentages lower is the 1.8% average population growth rate compared to the national average?
Answer: 0.2