title: Add a image in a fixed point in a bar plot
body: <p>How could I move the image of the arrow over the 2004 bar?
  Thanks in advance!</p>
  
  <p><a href="https://i.stack.imgur.com/xTV9q.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xTV9q.jpg" alt="enter image description here"></a>
  This is my code:</p>
  
  <pre><code>data %&gt;% 
    ggplot(aes(x=year, y=value, fill = gender)) +
    geom_bar(stat = "identity") +
    scale_fill_manual(values= c('#1380c9', '#ff6262')) +
    scale_y_continuous(limits=c(0, 1000)) +
    theme(axis.text.x = element_text(angle = 45, hjust = 1, size=8))+
    annotation_custom(rasterGrob(image, interpolate=TRUE, height = 0.08, width = 0.08))
  </code></pre>