for style use this ul.plainyearbasedtimelinelist{ border-left: 4px solid #E5E5E5 !important; margin-left: 20px; padding-left: 30px; }

gistfile1.txt

<?php

$last_changed = wp_cache_get( 'last_changed', 'posts' );
if ( ! $last_changed ) {
	$last_changed = microtime();
	wp_cache_set( 'last_changed', $last_changed, 'posts' );
}


global $wpdb;
$limit = '';
$order = 'DESC';
$where = "WHERE post_type = 'post' AND post_status = 'publish'";
$query = "SELECT YEAR(post_date) AS `year`, count(ID) as posts FROM $wpdb->posts  $where GROUP BY YEAR(post_date) ORDER BY post_date $order $limit";
$key = md5( $query );
$key = "plainyearbasedtimeline:$key:$last_changed";

if ( ! $results = wp_cache_get( $key, 'posts' ) ) {
	$results = $wpdb->get_results( $query );
	wp_cache_set( $key, $results, 'posts' );
}
//$output = '';
if ( $results ) {
	$afterafter = $after;
	foreach ( (array) $results as $result) {
		$url = get_year_link($result->year);
		$text = sprintf('%d', $result->year);
//									if ($show_post_count)
//										$after = '&nbsp;('.$result->posts.')' . $afterafter;
		echo '<p>'. get_archives_link($url, $text, $format, $before, $after).'</p>';
		// The Query
		$args = array(
			'post_type' 		=> 'post',
			'post_status'		=>'publish',
			'posts_per_page' 	=> -1,
			'year' 				=> intval($result->year)

		);

		$yearqkey = 'plainyearbasedtimelinepost'.$result->year;

		//if ( ! $the_query = wp_cache_get( $yearqkey, 'posts' ) ) {
			$the_query = new WP_Query( $args );
		//	wp_cache_set( $yearqkey, $the_query, 'posts' );
		//}



		// The Loop
		if ( $the_query->have_posts() ) {
			echo '<ul class="unstyled plainyearbasedtimelinelist">';
			while ( $the_query->have_posts() ) {
				$the_query->the_post();
				echo '<li> <time datetime="'.get_the_time('Y-m-j').'" >'.get_the_date().'</time> <a href="'.get_permalink().'">' . get_the_title() . '</a></li>';
			}
			echo '</ul>';
		} else {
			// no posts found
		}
		/* Restore original Post Data */
		//if ( ! $the_query = wp_cache_get( $yearqkey, 'posts' ) ) {
			wp_reset_postdata();
		//}
	}
	//echo $output;
}

?>
</div>