Qual é a percentagem (1960) de Troms, que tem uma percentagem (2040) inferior a 100 e uma percentagem (2000) inferior a 4,7?
CREATE TABLE table_name_48 (_percentage__1960_ INTEGER, county VARCHAR, _percentage__2040_ VARCHAR, _percentage__2000_ VARCHAR)
SELECT SUM(_percentage__1960_) FROM table_name_48 WHERE _percentage__2040_ < 100 AND _percentage__2000_ < 4.7 AND county = "troms"