Sungai Udang houses the PETRONAS Malacca Refinery Complex consisting two refining trains, established in 1994 and 1999 and owned by PETRONAS Penapisan (Melaka) Sdn. Bhd. and Malaysian Refining Company Sdn. Bhd. respectively. The total capacity of the refinery is 270,000 barrels of oil per day.The Malacca International Trade Centre in Ayer Keroh which was opened on June 2003 is the leading commercial center and the center for meetings, incentives, convention and exhibitions which plays an important role in the development of trade in Malacca.On 20 October 2010 an event was held to announce that Malacca had met the benchmark of 'Developed State' as set out by the Organisation for Economic Co-operation and Development and a declaration of "Melaka Maju 2010" was made.As of 2012, service sector contributes to the largest share of economy in Malacca accounted for 46.9%, followed by manufacturing (43.5%), agriculture (6.5%), construction (2.9%) and mining (0.1%). In terms of number of workforce, as of 2013, there were 275,000 people working in the industrial sectors, 225,000 people working in the service sectors, 35,000 people working in the entrepreneurship sectors and 12,300 people working in the agricultural sectors.Malacca has successfully opened itself up to foreign investors since the early 1970s. By 1997, the state has registered a total investment of over MYR16 billion. In 2014, the state achieved a total MYR4.4 billion worth of investment, in which MYR1.8 billion came from foreign investors.In 2013, Malacca had a GDP of MYR22,646 million with GDP per capita of MYR34,109. It had 3.2% GDP growth in 2013. Inflation rate in 2012 was 1.6%. As of 2015, the Malacca State Government has an outstanding MYR861.7 million of loan to the federal government. In 2014, the state government's reserve amounted to MYR206.61 million. The unemployment rate in 2014 was 0.9% or around 3,500 people. The state has a relatively well-educated population, with a youth literacy rate of 99.5% as reported by Malaysia Millennium Development Goals Report 2015.Currently there are 23 industrial areas which are centered along the edges of the city proper in suburbs which include Ayer Keroh, Batu Berendam, Cheng, Taman Tasik Utama and Tanjung Kling. While outside Malacca City, industrial areas include Alor Gajah and Sungai Udang. There are around 500 factories in the state which come from Germany, Japan, Singapore, Taiwan, United States etc. For small and medium-sized enterprises, a number of estates have been established by the state government.In 2016, Malacca become the safest place to live in Malaysia. The state crime rates dropped by 15.5 per cent in 2017 with 3,096 cases recorded compared to 3,663 in 2016. Malacca recorded a gross domestic product (GDP) growth of 8.1% in 2017, the second highest in the country after Sabah. Services sector remained the main contributor to the state’s economy at 44.8% of GDP. The GDP per capita also expanded 11.2% to RM46,015 in 2017, surpassing the national-level figure of RM42,228. The State Socioeconomic Report 2017 published on July 26, 2018 reported that Malacca was the state that recorded the lowest unemployment rate in 2017 with only 1.0 percent.

Question: How much did the crime rate drop in 2017?
Answer: 15.5 per cent