lubuntu.me/plugins/wp-statistics/includes/log/widgets/countries.php

<?php
function wp_statistics_generate_countries_postbox_content() {
	global $wpdb, $WP_Statistics;
	$ISOCountryCode = $WP_Statistics->get_country_codes();
	?>
    <table width="100%" class="widefat table-stats" id="last-referrer">
        <tr>
            <td width="10%" style='text-align: left'><?php _e( 'Rank', 'wp-statistics' ); ?></td>
            <td width="10%" style='text-align: left'><?php _e( 'Flag', 'wp-statistics' ); ?></td>
            <td width="40%" style='text-align: left'><?php _e( 'Country', 'wp-statistics' ); ?></td>
            <td width="40%" style='text-align: left'><?php _e( 'Visitor Count', 'wp-statistics' ); ?></td>
        </tr>
		<?php
		$result = $wpdb->get_results( "SELECT `location`, COUNT(`location`) AS `count` FROM `{$wpdb->prefix}statistics_visitor` GROUP BY `location` ORDER BY `count` DESC LIMIT 10" );
		$i      = 0;
		foreach ( $result as $item ) {
			$i ++;
			$item->location = strtoupper( $item->location );
			echo "<tr>";
			echo "<td style='text-align: left'>$i</td>";
			echo "<td style='text-align: left'><img src='" .
			     plugins_url( 'wp-statistics/assets/images/flags/' . $item->location . '.png' ) .
			     "' title='{$ISOCountryCode[$item->location]}'/></td>";
			echo "<td style='text-align: left !important'>{$ISOCountryCode[$item->location]}</td>";
			echo "<td style='text-align: left !important'>" . number_format_i18n( $item->count ) . "</td>";
			echo "</tr>";
		}
		?>
    </table>
	<?php
}