'Read CSV file it include several numbers [closed]

I have a data like this and for male and female column, I just need the first row (highlited ones). Could you please how can I read just these numbers and exclude rests.

df <- structure(list(
  col1 = c("First", "Frequency\nPercent", "CA", "TX"),
  col2 = c("Sex_3585", "Male", "298026\n5\n9", "45678\n15\n89"),
  col3 = c("", "Female", "57039\n10\n25", "64290\n100\n258")
),
class = "data.frame",
row.names = c(NA,-4L))

                col1          col2            col3
1              First      Sex_3585                
2 Frequency\nPercent          Male          Female
3                 CA  298026\n5\n9   57039\n10\n25
4                 TX 45678\n15\n89 64290\n100\n258



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