49 
Empirical evidence 3rdquintile ISRAEL SWEDEN BELARUS ANGOLA Slovak Republic Austria Tunisia Portugal Malawi Czech Republic Greece Honduras Switzerland Bulgaria Belgium Tajikistan Burundi Mali Hungary Ecuador EL SALVADOR GUINEA DOMINICAN REP. ZAMBIA2ndquintile 
SOUTH AFRICA AUSTRALIA CANADA POLAND Netherlands Kazakhstan Morocco Kenya Algeria Ivory Coast Ghana Sri Lanka Malaysia Romania Sudan Tanzania Cameroon Madagascar Chile Uganda Nepal Venezuela Peru Colombia1stquintile 
U.K. SPAIN ITALY FRANCE GERMANY BRAZIL U.S.A. EGYPT BANGLADESH RUSSIAN FED. Korean Rep. Ethiopia Philippines Pakistan India China Iran Mexico Thailand Turkey Vietnam Nigeria Japan Indonesia increasing