Name the lower index kcal/ nm3 for 61.32
create table table_1868929_1 (lower_index_kcal__nm_3 varchar, upper_index_mj__nm_3 varchar, PRIMARY KEY (lower_index_kcal__nm_3))
select lower_index_kcal__nm_3 from table_1868929_1 where upper_index_mj__nm_3 = "61.32"