R ggplot2：尽管position = position_dodge（0.9）

Question

我正在尝试在躲避的geom_bar图上添加数据标签。我知道参数：position = position_dodge（0.9）。但是，由于某种原因，这对我不起作用。谁能解释，我在做什么错？

我的代码：

data_test <- data.frame(Country = c(rep("Poland",5), rep("Europe", 5)), 
           Year = c(rep(c(2014, 2015, 2016, 2017, 2018),2)),
           value = c(0.38, 0.34, 0.38, 0.34, 0.51, 0.41, 0.40, 0.42, 0.33, 0.45))

ggplot(data_test) +
  geom_bar(aes(Year, value, fill = Country),
           position = "dodge", stat = "identity", width = 0.75) +
  geom_text(aes(label = scales::percent(round((value), digits = 2)),
                x = Year, y = value + 0.05),
                size = 5, position = position_dodge(width = 0.9))