Month	Millions Of Pairs
1921-11-01	7.03000
1921-12-01	8.06000
1922-01-01	8.45000
1922-02-01	9.10000
1922-03-01	11.0900
1922-04-01	9.91000
1922-05-01	9.49000
1922-06-01	8.76000
1922-07-01	7.92000
1922-08-01	9.36000
1922-09-01	9.14000
1922-10-01	10.1600
1922-11-01	9.68000
1922-12-01	9.03000
1923-01-01	10.4400
1923-02-01	10.4600
1923-03-01	12.8000
1923-04-01	11.0300
1923-05-01	10.5800
1923-06-01	9.61000
1923-07-01	8.35000
1923-08-01	9.69000
1923-09-01	9.30000
1923-10-01	10.1500
1923-11-01	8.29000
1923-12-01	7.31000
1924-01-01	8.68000
1924-02-01	9.23000
1924-03-01	10.6300
1924-04-01	10.1800
1924-05-01	8.96000
1924-06-01	7.64000
1924-07-01	7.26000
1924-08-01	9.17000
1924-09-01	10.4600
1924-10-01	11.5300
1924-11-01	8.79000
1924-12-01	7.85000
1925-01-01	8.40000
1925-02-01	9.03000
1925-03-01	10.6500
1925-04-01	10.3700
1925-05-01	8.86000
1925-06-01	8.12000
1925-07-01	8.67000
1925-08-01	10.6600
1925-09-01	11.3900
1925-10-01	11.5000
1925-11-01	8.01000
1925-12-01	7.70000
1926-01-01	8.34000
1926-02-01	9.25000
1926-03-01	11.0000
1926-04-01	9.50000
1926-05-01	8.64000
1926-06-01	8.88000
1926-07-01	9.10000
1926-08-01	11.2200
1926-09-01	11.6200
1926-10-01	11.4800
1926-11-01	8.52000
1926-12-01	7.67000
1927-01-01	7.96000
1927-02-01	9.15000
1927-03-01	10.7800
1927-04-01	10.0200
1927-05-01	8.92000
1927-06-01	9.38000
1927-07-01	9.60000
1927-08-01	13.3200
1927-09-01	13.0100
1927-10-01	12.0800
1927-11-01	8.24000
1927-12-01	7.14000
1928-01-01	9.21000
1928-02-01	10.9800
1928-03-01	12.8600
1928-04-01	10.2300
1928-05-01	9.64000
1928-06-01	9.34000
1928-07-01	10.3500
1928-08-01	13.5800
1928-09-01	12.7300
1928-10-01	13.2200
1928-11-01	8.36000
1928-12-01	7.02000
1929-01-01	10.0900
1929-02-01	10.8500
1929-03-01	12.7200
1929-04-01	11.0300
1929-05-01	10.3400
1929-06-01	9.63000
1929-07-01	11.3800
1929-08-01	14.4900
1929-09-01	14.0600
1929-10-01	14.0700
1929-11-01	8.43000
1929-12-01	7.32000
1930-01-01	9.99000
1930-02-01	10.3200
1930-03-01	11.8700
1930-04-01	11.4700
1930-05-01	8.98000
1930-06-01	8.30000
1930-07-01	9.12000
1930-08-01	11.8000
1930-09-01	12.0800
1930-10-01	10.5900
1930-11-01	5.18000
1930-12-01	5.53000
1931-01-01	7.87000
1931-02-01	10.1500
1931-03-01	12.8600
1931-04-01	12.2800
1931-05-01	11.4200
1931-06-01	10.4200
1931-07-01	10.8800
1931-08-01	13.5700
1931-09-01	12.4300
1931-10-01	8.58000
1931-11-01	4.11000
1931-12-01	5.73000
1932-01-01	8.67000
1932-02-01	11.2200
1932-03-01	13.2000
1932-04-01	10.8300
1932-05-01	8.81000
1932-06-01	9.17000
1932-07-01	8.18000
1932-08-01	14.2800
1932-09-01	14.0800
1932-10-01	11.6000
1932-11-01	5.70000
1932-12-01	6.19000
1933-01-01	9.64000
1933-02-01	11.7600
1933-03-01	12.0800
1933-04-01	11.4400
1933-05-01	12.9600
1933-06-01	12.9900
1933-07-01	12.9700
1933-08-01	14.9800
1933-09-01	12.6100
1933-10-01	11.4500
1933-11-01	7.04000
1933-12-01	6.94000
1934-01-01	10.9900
1934-02-01	12.8900
1934-03-01	14.7600
1934-04-01	14.0300
1934-05-01	13.7800
1934-06-01	10.1400
1934-07-01	12.1000
1934-08-01	15.4300
1934-09-01	10.8300
1934-10-01	9.05000
1934-11-01	6.37000
1934-12-01	7.94000
1935-01-01	12.7400
1935-02-01	13.8600
1935-03-01	15.4200
1935-04-01	14.9800
1935-05-01	11.9900
1935-06-01	9.58000
1935-07-01	13.6300
1935-08-01	16.2800
1935-09-01	13.6300
1935-10-01	12.1700
1935-11-01	7.34000
1935-12-01	10.1500
1936-01-01	14.5600
1936-02-01	15.0200
1936-03-01	15.5400
1936-04-01	14.1400
1936-05-01	12.8400
1936-06-01	11.1400
1936-07-01	14.9800
1936-08-01	18.1800
1936-09-01	17.2400
1936-10-01	14.4100
1936-11-01	8.47000
1936-12-01	11.8000
1937-01-01	16.7500
1937-02-01	17.7400
1937-03-01	20.5000
1937-04-01	16.8200
1937-05-01	14.2500
1937-06-01	12.8800
1937-07-01	15.4700
1937-08-01	17.7600
1937-09-01	14.4400
1937-10-01	10.9500
1937-11-01	6.19000
1937-12-01	8.16000
1938-01-01	12.6100
1938-02-01	15.3900
1938-03-01	18.7600
1938-04-01	15.9000
1938-05-01	13.4300
1938-06-01	9.78000
1938-07-01	13.7200
1938-08-01	18.9900
1938-09-01	15.5900
1938-10-01	12.0700
1938-11-01	7.95000
1938-12-01	10.1900
1939-01-01	15.6000
1939-02-01	17.3500
1939-03-01	20.7800
1939-04-01	15.2600
1939-05-01	13.9000
1939-06-01	12.5600
1939-07-01	15.5400
1939-08-01	19.6000
1939-09-01	15.0400
1939-10-01	13.2600
1939-11-01	10.1500
1939-12-01	10.8100
1940-01-01	16.3500
1940-02-01	17.5700
1940-03-01	17.0000
1940-04-01	14.4600
1940-05-01	12.8000
1940-06-01	11.0800
1940-07-01	14.6100
1940-08-01	17.1400
1940-09-01	13.8400
1940-10-01	12.5000
1940-11-01	8.96000
1940-12-01	11.5100
1941-01-01	16.8300
1941-02-01	18.0700
1941-03-01	20.0500
1941-04-01	19.1600
1941-05-01	17.1500
1941-06-01	15.3300
1941-07-01	19.0200
1941-08-01	18.9700
1941-09-01	16.8100
1941-10-01	15.9000
1941-11-01	10.9000
1941-12-01	14.1800
1942-01-01	17.5800
1942-02-01	17.4500
1942-03-01	20.1700
1942-04-01	18.9100
1942-05-01	16.4700
1942-06-01	15.2300
1942-07-01	17.1900
1942-08-01	15.7900
1942-09-01	14.6100
1942-10-01	15.2900
1942-11-01	13.7300
1942-12-01	15.3700
1943-01-01	16.2000
1943-02-01	16.1300
1943-03-01	18.3300
1943-04-01	17.1300
1943-05-01	14.7600
1943-06-01	17.0200
1943-07-01	16.4300
1943-08-01	16.9400
1943-09-01	15.9600
1943-10-01	15.9900
1943-11-01	15.2700
1943-12-01	16.3000
1944-01-01	16.7200
1944-02-01	16.9200