ggplot add text to the center of a donut chart in R - r

Question

I am working on a donut chart using ggplot2, but I need the center of the plot to contain text.
Here's sample data (found from this site: https://www.datanovia.com/en/blog/how-to-create-a-pie-chart-in-r-using-ggplot2/):
library(dplyr)
count.data <- data.frame(
class = c("1st", "2nd", "3rd", "Crew"),
n = c(325, 285, 706, 885),
prop = c(14.8, 12.9, 32.1, 40.2)
)
count.data <- count.data %>%
arrange(desc(class)) %>%
mutate(lab.ypos = cumsum(prop) - 0.5*prop)
count.data
I then modified their code to get this donut chart:
library(ggplot2)
library(dplyr)
mycols <- c("#0073C2FF", "#EFC000FF", "#868686FF", "#CD534CFF")
ggplot(count.data, aes(x = 2, y = prop, fill = class)) +
geom_bar(stat = "identity", color = "white") +
coord_polar(theta = "y", start = 0)+
geom_text(aes(y = lab.ypos, label = paste0("n = ", n, ", \n", prop, "%")), color = "white")+
scale_fill_manual(values = mycols) +
theme_void() +
xlim(.5, 2.5)
The plot looks like this:
It is exactly what I want except I need the center of the donut to have the proportion from a variable. In this case, I want the center to say 40.2% (the prop of crew, in this example).
How do I do this?

Answer 1

Edit
Used annotate as suggested by #aosmith and made it a direct call to crew.
like this?
ggplot(count.data, aes(x = 2, y = prop, fill = class)) +
geom_bar(stat = "identity", color = "white") +
coord_polar(theta = "y", start = 0)+
geom_text(aes(y = lab.ypos, label = paste0("n = ", n, ", \n", prop, "%")), color = "white")+
scale_fill_manual(values = mycols) +
theme_void() +
xlim(.5, 2.5) +
annotate(geom = 'text', x = 0.5, y = 0, label = paste0(count.data$prop[count.data$class == 'Crew'], "%"))