United Nations Statistical Office reported that the indicator increased greatly by 549.5 percent in comparison with 2016. Propylene export sharply rose from 4 171 kilogram in 2016 to 27 090.69 kilogram prior year, versus the previous year when it went down by 54.93%. South Africa saw a fall of 99.74% in propylene export over the past 18 years. Likewise, it has shown the average annual growth rate of 0.2% over the last 5 years with a slight overall drop since the start of observations. It averaged 711 143.59 kilogram from 2000 to 2017 and it attained its all-time high of 10 606 404 kilogram in 2000 and record low of 3 852 kilogram in 2011.