*CANADA APRIL CONSUMER PRICES RISE 1.7% Y/Y; EST. +1.6% *CANADA APRIL MEDIAN CPI RISES 3.2% Y/Y; EST. +2.9% *CANADA APRIL TRIMMED CPI RISES 3.1% Y/Y; EST. +2.8% *CANADA APRIL CORE CPI RISES 2.5% Y/Y; PREV. 2.2%