Figure 10
The horizontal axis is labeled “Country”, and has multiple country markings arranged from left to right as follows: “Not Specified”, “U S A”, “Multiple Countries”, “China”, “India”, “Vietnam”, “Globally”, “Europe”, “Spain”, “South Africa”, “Italy”, “U K”, “Taiwan”, “Pakistan”, “Indonesia”, “Germany”, “France”, “South Korea”, “Norway”, “North America”, “Malaysia”, “Japan”, “Sweden”, “Russia”, “Nordic Countries”, “Nigeria”, “Netherland”, “Morocco”, “Middle East Region”, “Lithuania”, “Latin America”, “Iran”, “Greece”, “Ghana”, “Czech Republic”, “Bangladesh”. The vertical axis is labeled “Number of Studies”, and ranges from 0 to 25 in increments of 5 units. The data for the bars is as follows: Not Specified: 22. U S A: 20. Multiple Countries: 19. China: 12. India: 11. Vietnam: 8. Globally: 8. Europe: 5. Spain: 4. South Africa: 4. Italy: 4. U K: 3. Taiwan: 3. Pakistan: 3. Indonesia: 3. Germany: 3. France: 3. South Korea: 2. Norway: 2. North America: 2. Malaysia: 2. Japan: 2. Sweden: 1. Russia: 1. Nordic Countries: 1. Nigeria: 1. Netherland: 1. Morocco: 1. Middle East Region: 1. Lithuania: 1. Latin America: 1. Iran: 1. Greece: 1. Ghana: 1. Czech Republic: 1. Bangladesh: 1.Geographical distribution of the selected studies