Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_63615 ( "Rank" real, "Country/Region" text, "Expenditures on R&D (billions of US$ , PPP )" real, "% of GDP PPP" text, "Year" real )

### Question ###
What is the lowest expenditures on R&D for Poland after 2011?

### Accurate SQL ###

SELECT MIN("Expenditures on R&D (billions of US$ , PPP )") FROM table_63615 WHERE "Country/Region" = 'poland' AND "Year" > '2011'