Table schema:
CREATE TABLE table_28741_1 (_usd__2012_ VARCHAR, gdp__nominal__per_capita VARCHAR, capital VARCHAR)

Question: What are the numbers for GDP (nominal) per capita and USD (2012) of the area with Phnom Penh as capital?
SQL: SELECT COUNT(gdp__nominal__per_capita), _usd__2012_ FROM table_28741_1 WHERE capital = "Phnom Penh"