Quarter	Per Cent
1920-01-01	0.160000
1920-04-01	23.0800
1920-07-01	1.16000
1920-10-01	0.870000
1921-01-01	34.5500
1921-04-01	19.7400
1921-07-01	21.9400
1921-10-01	34.3200
1922-01-01	5.85000
1922-04-01	36.7900
1922-07-01	22.6600
1922-10-01	28.4000
1923-01-01	3.94000
1923-04-01	9.32000
1923-07-01	0.000000
1923-10-01	21.8800
1924-01-01	0.710000
1924-04-01	4.61000
1924-07-01	6.66000
1924-10-01	34.9000
1925-01-01	48.3300
1925-04-01	19.3200
1925-07-01	32.0600
1925-10-01	39.0900
1926-01-01	42.7600
1926-04-01	65.0100
1926-07-01	65.5300
1926-10-01	64.9700
1927-01-01	38.1500
1927-04-01	29.7000
1927-07-01	43.7400
1927-10-01	73.7700
1928-01-01	66.2800
1928-04-01	57.1600
1928-07-01	96.4100
1928-10-01	46.6800
1929-01-01	80.8900
1929-04-01	26.0100
1929-07-01	95.7900
1929-10-01	5.02000
1930-01-01	49.1700
1930-04-01	55.9100
1930-07-01	22.4700
1930-10-01	0.000000