Write SQL query to solve given problem: Calculate the percentage of penalty minutes of Swedish players in OHL league among all players.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT CAST(COUNT(CASE WHEN T1.nation = 'Sweden' THEN T2.PIM ELSE NULL END) AS REAL) * 100 / COUNT(*) FROM PlayerInfo AS T1 INNER JOIN SeasonStatus AS T2 ON T1.ELITEID = T2.ELITEID WHERE T2.LEAGUE = 'OHL'