Year: 2010
Vietnam: 12.1
Thailand: 6.9
Singapore: 0.7
Lao PDR: 8.9

Year: 2011
Vietnam: 10.7
Thailand: 7
Singapore: 0.7
Lao PDR: 7.6

Year: 2012
Vietnam: 8.8
Thailand: 6.7
Singapore: 0.6
Lao PDR: 7.1

Year: 2013
Vietnam: 7.7
Thailand: 6.7
Singapore: 0.6
Lao PDR: 6.7

Year: 2014
Vietnam: 5.3
Thailand: 6.6
Singapore: 0.6
Lao PDR: 5.7