What are the numbers for GDP (nominal) per capita and USD (2012) of the area with Phnom Penh as capital?
create table table_28741_1 (_usd__2012_ varchar, gdp__nominal__per_capita varchar, capital varchar, PRIMARY KEY (_usd__2012_))
select count(gdp__nominal__per_capita), _usd__2012_ from table_28741_1 where capital = "phnom penh"