The Figure below reveals that during the 2000-2014 period, GDP per capital of many economies rose as a result of more cross-border trade in services. What could be the reasons contributing to this outcome?

Source: Data from World Development Indicators and authors' calculations. -20% -10% 0% 10% 20% 30% 40% 50% 60% Macao, China Sao Tome and Principe Ghana Grenada Myanmar Ireland Georgia Cambodia Uruguay Panama Luxembourg Mozambique Armenia Antigua and Barbuda Uganda Haiti Cyprus Azerbaijan Bangladesh Costa Rica Israel China Bhutan Lithuania Montenegro Trinidad and Tobago Kenya Jordan Argentina Samoa Paraguay Australia Romania Poland as a result of more cross-border trade in services Kuwait, the State of Mauritius Estonia Malawi Guatemala Belgium Dominican Republic Indonesia New Zealand Zambia Albania Sweden Cabo Verde Russian Federation Czech Republic Algeria Netherlands Republic of Korea Slovenia Nigeria Mexico Figure C.8: In the last decade, the GDP per capita of many economies rose Pakistan Canada Total percentage change in GDP per capita from cross-border trade in services over 2000-14 Bulgaria Slovak Republic Latvia Croatia Kazakhstan Saudi Arabia, Kingdom of Bosnia and Herzegovina Spain Bahamas United Kingdom Lesotho Sudan Italy Tunisi Eswatin Liberia