I am using a data set pictured below to generate this figure using ggplot. I am attempting to add a trend line to the plot. I have tried multiple times to add the line in different methods and have not been able to figure it out. I appreciate any help you are able to provide.

Data table pictured below:

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I have used the code below to generate the plot below but have not been able to find a way to add a trend line to the plot. If anyone is able to help I would greatly appreciate it.

enter image description here

ggplot(IIHGLPy, aes(x=Year, y=TotGLP)) +
  geom_point(shape=18, color="black") +
  geom_smooth(method = lm, formula = (y ~ exp(x)), se = FALSE, color = "blue") +
labs(title = "GLP-1 Agonist Trend in IIH Patients", 
     x = "Years", y = "Total Number of Patients on GLP-1 Aogonists")