Quarter	Marks (Average Per Quarter)
1920-01-01	40.1900
1920-04-01	56.0400
1920-07-01	61.8200
1920-10-01	71.6300
1921-01-01	71.6100
1921-04-01	69.6500
1921-07-01	75.6800
1921-10-01	105.490
1922-01-01	134.620
1922-04-01	197.210
1922-07-01	464.860
1922-10-01	1901.73
1924-01-01	6.02000
1924-04-01	6.77000
1924-07-01	7.39000
1924-10-01	7.51000
1925-01-01	7.75000
1925-04-01	7.91000
1925-07-01	8.03000
1925-10-01	8.27000
1926-01-01	8.45000
1926-04-01	8.48000
1926-07-01	8.62000
1926-10-01	8.87000
1927-01-01	8.90000
1927-04-01	9.10000
1927-07-01	9.34000
1927-10-01	9.42000
1928-01-01	9.41000
1928-04-01	9.70000
1928-07-01	9.92000
1928-10-01	9.94000
1929-01-01	9.95000
1929-04-01	10.0400
1929-07-01	10.1200
1929-10-01	10.2000
1930-01-01	10.1900
1930-04-01	10.1800
1930-07-01	10.1600
1930-10-01	10.1400
1931-01-01	9.46000
1931-04-01	9.45000
1931-07-01	9.39000
1931-10-01	8.76000
1932-01-01	7.90000
1932-04-01	7.88000
1932-07-01	7.87000
1932-10-01	8.04000