I need a bar graph without internal lines but it doesn't seem to work for me, please help
library(ggplot2)
ggplot(data = Datoshoja1, aes(x = `AreaName`, y = `1990.0`)) + 
  geom_bar(stat="identity",  color = 'red', fill = 'darkred') +
  labs(title= 'Inmigrantes en EEUU año 1990', x = '', y = 'Cantidad de inmigrantes')
this is what I tried and the chart looks like this

but I need it to look like this

 
    