A and B produce the same kind of fruit. The quantity of fruit produced in A remains unchanged every year, and the quantity of fruit produced in B doubles every year. It is known that the total number of fruits produced in A and B in 1990 was 98 tons. In 1991, If A and B produce a total of 106 tons of fruit, then in how many years is the first time that the quantity of fruit produced in B exceeds the quantity of fruit produced in A?
甲、乙两地出产同一种水果，甲地出产的水果数量每年保持不变，乙地出产的水果数量每年增加一倍，已知1990年甲、乙两地出产水果总数为98吨，1991年甲、乙两地总计出产水果106吨，则乙地出产水果的数量第一次超过甲地出产的水果数量是在多少年．
<result>1_994</result>