Month	Millions Of Pairs
1921-11-01	6.78000
1921-12-01	7.46000
1922-01-01	7.77000
1922-02-01	6.70000
1922-03-01	7.73000
1922-04-01	6.80000
1922-05-01	6.50000
1922-06-01	6.21000
1922-07-01	6.32000
1922-08-01	7.95000
1922-09-01	8.51000
1922-10-01	8.56000
1922-11-01	8.70000
1922-12-01	8.24000
1923-01-01	9.10000
1923-02-01	8.69000
1923-03-01	10.0500
1923-04-01	9.02000
1923-05-01	8.41000
1923-06-01	7.44000
1923-07-01	7.13000
1923-08-01	8.80000
1923-09-01	7.91000
1923-10-01	8.90000
1923-11-01	8.06000
1923-12-01	6.77000
1924-01-01	7.87000
1924-02-01	7.34000
1924-03-01	7.55000
1924-04-01	6.72000
1924-05-01	6.09000
1924-06-01	5.65000
1924-07-01	6.15000
1924-08-01	7.18000
1924-09-01	7.59000
1924-10-01	8.33000
1924-11-01	6.99000
1924-12-01	7.20000
1925-01-01	7.66000
1925-02-01	7.14000
1925-03-01	7.64000
1925-04-01	7.19000
1925-05-01	6.22000
1925-06-01	6.15000
1925-07-01	6.75000
1925-08-01	7.35000
1925-09-01	7.98000
1925-10-01	8.40000
1925-11-01	6.92000
1925-12-01	7.15000
1926-01-01	6.86000
1926-02-01	6.67000
1926-03-01	7.45000
1926-04-01	6.52000
1926-05-01	5.66000
1926-06-01	6.57000
1926-07-01	6.75000
1926-08-01	7.98000
1926-09-01	8.68000
1926-10-01	8.52000
1926-11-01	7.52000
1926-12-01	7.48000
1927-01-01	7.66000
1927-02-01	7.77000
1927-03-01	8.51000
1927-04-01	7.36000
1927-05-01	6.93000
1927-06-01	7.43000
1927-07-01	7.99000
1927-08-01	9.14000
1927-09-01	9.05000
1927-10-01	8.64000
1927-11-01	7.47000
1927-12-01	7.39000
1928-01-01	7.74000
1928-02-01	7.96000
1928-03-01	8.19000
1928-04-01	6.54000
1928-05-01	6.98000
1928-06-01	7.45000
1928-07-01	7.09000
1928-08-01	9.22000
1928-09-01	7.87000
1928-10-01	8.33000
1928-11-01	7.23000
1928-12-01	6.36000
1929-01-01	7.65000
1929-02-01	7.10000
1929-03-01	7.43000
1929-04-01	7.20000
1929-05-01	7.76000
1929-06-01	7.89000
1929-07-01	8.27000
1929-08-01	9.52000
1929-09-01	8.62000
1929-10-01	9.54000
1929-11-01	7.47000
1929-12-01	6.33000
1930-01-01	7.58000
1930-02-01	6.65000
1930-03-01	6.86000
1930-04-01	7.27000
1930-05-01	6.37000
1930-06-01	6.77000
1930-07-01	6.25000
1930-08-01	6.61000
1930-09-01	6.57000
1930-10-01	6.44000
1930-11-01	4.74000
1930-12-01	5.03000
1931-01-01	5.25000
1931-02-01	5.69000
1931-03-01	6.25000
1931-04-01	6.64000
1931-05-01	6.74000
1931-06-01	7.24000
1931-07-01	7.35000
1931-08-01	8.24000
1931-09-01	7.42000
1931-10-01	6.13000
1931-11-01	5.11000
1931-12-01	5.35000
1932-01-01	5.18000
1932-02-01	5.85000
1932-03-01	6.64000
1932-04-01	5.34000
1932-05-01	5.42000
1932-06-01	5.85000
1932-07-01	5.14000
1932-08-01	6.82000
1932-09-01	7.89000
1932-10-01	8.04000
1932-11-01	6.92000
1932-12-01	5.40000
1933-01-01	5.76000
1933-02-01	6.09000
1933-03-01	6.84000
1933-04-01	6.22000
1933-05-01	8.36000
1933-06-01	9.04000
1933-07-01	8.33000
1933-08-01	9.14000
1933-09-01	7.66000
1933-10-01	8.29000
1933-11-01	6.91000
1933-12-01	6.19000
1934-01-01	7.10000
1934-02-01	7.92000
1934-03-01	8.67000
1934-04-01	8.43000
1934-05-01	8.22000
1934-06-01	7.59000
1934-07-01	6.73000
1934-08-01	8.62000
1934-09-01	6.97000
1934-10-01	7.63000
1934-11-01	6.94000
1934-12-01	6.56000
1935-01-01	7.71000
1935-02-01	7.61000
1935-03-01	8.19000
1935-04-01	8.06000
1935-05-01	8.16000
1935-06-01	7.82000
1935-07-01	7.93000
1935-08-01	9.13000
1935-09-01	8.39000
1935-10-01	9.92000
1935-11-01	8.16000
1935-12-01	8.44000
1936-01-01	9.05000
1936-02-01	8.33000
1936-03-01	8.25000
1936-04-01	8.06000
1936-05-01	7.23000
1936-06-01	7.57000
1936-07-01	8.72000
1936-08-01	9.30000
1936-09-01	9.55000
1936-10-01	10.0700
1936-11-01	8.38000
1936-12-01	9.27000
1937-01-01	9.45000
1937-02-01	9.90000
1937-03-01	11.2300
1937-04-01	10.0100
1937-05-01	8.78000
1937-06-01	9.08000
1937-07-01	8
1937-08-01	?G???????????????p???????@????????
1937-09-01	??0?????
~~?
1937-10-01	20.4500
1937-11-01	20.2600
1937-12-01	19.9700
1938-01-01	22.6700
1938-02-01	24.2800
1938-03-01	24.5900
1938-04-01	28.0800
1938-05-01	25.6000
1938-06-01	27.6500
1938-07-01	31.8400
1938-08-01	26.6000
1938-09-01	27.9600
1938-10-01	00
1938-11-01	1.94000
1938-12-01	2.06000
1939-01-01	2.19000
1939-02-01	2.13000
1939-03-01	2.17000
1939-04-01	2.22000
1939-05-01	2.27000
1939-06-01	2.25000
1939-07-01	2.39000
1939-08-01	2.39000
1939-09-01	2.40000
1939-10-01	2.68000
1939-11-01	2.44000
1939-12-01	2.57000
1940-01-01	2.67000
1940-02-01	2.51000
1940-03-01	2.64000
1940-04-01	2.69000
1940-05-01	2.59000
1940-06-01	2.55000
1940-07-01	2.62000
1940-08-01	2.40000
1940-09-01	2.40000
1940-10-01	2.65000
1940-11-01	2.46000
1940-12-01	2.65000
1941-01-01	2.45000
1941-02-01	2.43000
1941-03-01	2.52000
1941-04-01	2.41000
1941-05-01	2.25000
1941-06-01	2.20000
1941-07-01	1.95000
1941-08-01	1.98000
1941-09-01	1.87000
1941-10-01	1.80000
1941-11-01	1.88000
1941-12-01	1.92000
1942-01-01	1.99000
1942-02-01	2.06000
1942-03-01	2.24000
1942-04-01	2.10000
1942-05-01	2.25000
1942-06-01	2.27000
1942-07-01	2.06000
1942-08-01	2.27000
1942-09-01	2.22000
1942-10-01	2.22000
1942-11-01	2.29000
1942-12-01	2.18000
1943-01-01	2.40000
1943-02-01	2.39000
1943-03-01	9.39000
1943-04-01	10.2800
1943-05-01	9.42000
1943-06-01	9.26000
1943-07-01	9.85000
1943-08-01	8.40000
1943-09-01	9.17000
1943-10-01	9.54000
1943-11-01	7.58000
1943-12-01	9.34000
1944-01-01	8.90000
1944-02-01	9.39000
1944-03-01	9.25000
1944-04-01	8.64000
1944-05-01	9.36000
1944-06-01	9.15000
1944-07-01	9.90000
1944-08-01	9.11000
1944-09-01	9.51000
1944-10-01	9.40000
1944-11-01	8.22000
1944-12-01	8.83000
1945-01-01	7.02000
1945-02-01	8.49000
1945-03-01	8.17000
1945-04-01	7.47000