92220
As the United States began to return to a higher rate in the end of 2015 investments in the United States became more attractive and the rate of investment in developing countries began to fall .
 United States, United States
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United States, United States