Because they use 200 year old methods to make the rum
as quoted in the link: "This varies though from year to year depending on how much rain has fallen on the sugar cane from which the rum is made, some years it can get up to 86% volume / 180% proof if it’s been dry."
(
Crap Little Monkey Deathstar, so good they built it twice, Mon 28 Jun 2010, 11:44,
Reply)