import matplotlib.pyplot as plt
import pandas as pd

data = pd.read_csv("indices.csv", sep = ';')

x = data['time']
y1 = data['oecd_11']
y2 = data['ch_ppi_11']

plt.plot(x, y1)
plt.plot(x, y2)

plt.title('OECD v BFS PPI (Norm. Jan 2011)')
plt.xlabel('Time')
plt.ylabel('Index Values')

plt.ylim([85, 105])

plt.show()