जनसांख्यिकीय ट्रेंड में सापेक्ष परिवर्तन

# View rydf
rydf

# Get the first column of rydf
column1 <- rydf[, 1]

# Normalize the first 8 columns
for(this_column in 1:8) {
  rydf[, this_column] <- rydf[, ___] / ___
}

# Convert the data to long format
rydf_long <- pivot_longer(rydf, -Race, names_to = "Year", values_to = "Proportion")

# Plot
ggplot(rydf_long, aes(x = ___, y = ___, group = Race, color = Race)) + 
    geom_line()