Question: Among all penalty minutes picked up by Ak Bars Kazan in the 1999-2000 season, identify the percentage picked up by Yevgeni Muratov.
SQL: SELECT CAST(SUM(CASE WHEN T2.PlayerName = 'Yevgeni Muratov' THEN T1.PIM ELSE 0 END) AS REAL) * 100 / SUM(T1.PIM) FROM SeasonStatus AS T1 INNER JOIN PlayerInfo AS T2 ON T1.ELITEID = T2.ELITEID WHERE T1.SEASON = '1999-2000' AND T1.TEAM = 'Ak Bars Kazan'