How do I show multiple boxplots showing distribution using ggplot

问题

I'm trying to get a graph like this to show boxplot distributions for each age group:

But instead my plot looks like this:

How can I get the boxplots to show rather than the points? Why is my Y axis non numeric?

My data looks like this:

And here's the plot code I am trying:

p2 <- ggplot(data = popSample, aes(x = AGEGRP, y = TOT_POP)) +
  geom_boxplot(aes(group = AGEGRP)) +
  scale_x_discrete() +
  theme_light()
p2

Thank you for helping someone who is learning,

来源：https://stackoverflow.com/questions/60133762/how-do-i-show-multiple-boxplots-showing-distribution-using-ggplot