public function output_report() {

		$ranges = array(
			'year'       => __( 'Year', 'woocommerce' ),
			'last_month' => __( 'Last month', 'woocommerce' ),
			'month'      => __( 'This month', 'woocommerce' ),
			'7day'       => __( 'Last 7 days', 'woocommerce' ),
		);

		$this->chart_colours = array(
			'discount_amount' => '#3498db',
			'coupon_count'    => '#d4d9dc',
		);

		$current_range = ! empty( $_GET['range'] ) ? sanitize_text_field( wp_unslash( $_GET['range'] ) ) : '7day';

		if ( ! in_array( $current_range, array( 'custom', 'year', 'last_month', 'month', '7day' ) ) ) {
			$current_range = '7day';
		}

		$this->check_current_range_nonce( $current_range );
		$this->calculate_current_range( $current_range );

		include WC()->plugin_path() . '/includes/admin/views/html-report-by-date.php';
	}