I want to see the percentage values on the stacked bars in my plot. Here is an example,

library(tidyverse)

year <- c(2011, 2011, 2012, 2012, 2013, 2013)
gender <- c("M", "F", "M", "F", "M", "F")
value <- c(10, 12, 12, 15, 32, 53)
dataf <- data.frame(year, gender, value)

dataf$year <- as.Date(as.character(dataf$year), format = "%Y")

ggplot(dataf, aes(fill = gender,
           y = value, 
           x = year)) +
  geom_bar(position = "fill", 
           stat = "identity")

Here is a post covering similar issues but not sure how to calculate percentage on the value column I have. Any suggestions?