Of all the beer styles produced by Stevens Point Brewery, how many percent do they allot for American Adjunct Lager?
Percent allotted = count(American Adjunct Lager beer styles) / count(styles) * 100%
SELECT CAST(SUM(IIF(T1.style = 'American Adjunct Lager', 1, 0)) AS REAL) * 100 / COUNT(T1.brewery_id) FROM beers AS T1 INNER JOIN breweries AS T2 ON T1.brewery_id = T2.id WHERE T2.name = 'Stevens Point Brewery'