When the % of boundary by water is 63% what is the overall number of zip code prefix(es)?
create table table_14253123_1 (zip_code_prefix_es_ varchar, _percentage_of_boundary_by_water varchar, PRIMARY KEY (zip_code_prefix_es_))
select count(zip_code_prefix_es_) from table_14253123_1 where _percentage_of_boundary_by_water = "63%"