Month	Thousand Units
1940-01-01	1.20000
1940-02-01	1.70000
1940-03-01	2.00000
1940-04-01	2.60000
1940-05-01	2.40000
1940-06-01	2.10000
1940-07-01	2.40000
1940-08-01	2.40000
1940-09-01	2.60000
1940-10-01	2.80000
1940-11-01	1.80000
1940-12-01	1.60000
1941-01-01	1.60000
1941-02-01	1.90000
1941-03-01	2.80000
1941-04-01	2.90000
1941-05-01	2.90000
1941-06-01	2.80000
1941-07-01	2.60000
1941-08-01	2.60000
1941-09-01	2.70000
1941-10-01	2.50000
1941-11-01	1.60000
1941-12-01	1.50000
1942-01-01	1.30000
1942-02-01	1.70000
1942-03-01	2.30000
1942-04-01	2.90000
1942-05-01	1.00000
1942-06-01	1.10000
1942-07-01	1.20000
1942-08-01	0.800000
1942-09-01	1.20000
1942-10-01	1.30000
1942-11-01	1.40000
1942-12-01	1.30000
1943-01-01	0.900000
1943-02-01	0.700000
1943-03-01	1.10000
1943-04-01	1.50000
1943-05-01	1.80000
1943-06-01	1.80000
1943-07-01	1.60000
1943-08-01	2.20000
1943-09-01	1.80000
1943-10-01	1.90000
1943-11-01	1.40000
1943-12-01	1.10000
1944-01-01	1.00000
1944-02-01	0.500000
1944-03-01	1.20000
1944-04-01	1.10000
1944-05-01	1.00000
1944-06-01	1.50000
1944-07-01	0.900000
1944-08-01	0.700000
1944-09-01	0.600000
1944-10-01	0.800000
1944-11-01	0.700000
1944-12-01	0.600000
1945-01-01	0.200000
1945-02-01	0.400000
1945-03-01	0.900000
1945-04-01	0.900000
1945-05-01	0.900000
1945-06-01	0.600000
1945-07-01	0.700000
1945-08-01	0.600000
1945-09-01	0.700000
1945-10-01	0.800000
1945-11-01	1.00000
1945-12-01	1.10000
1946-01-01	1.30000
1946-02-01	1.60000
1946-03-01	2.40000
1946-04-01	2.40000
1946-05-01	3.00000
1946-06-01	2.50000
1946-07-01	2.20000
1946-08-01	2.00000
1946-09-01	2.00000
1946-10-01	1.90000
1946-11-01	1.70000
1946-12-01	1.30000
1947-01-01	1.50000
1947-02-01	1.60000
1947-03-01	2.20000
1947-04-01	2.80000
1947-05-01	3.10000
1947-06-01	3.40000
1947-07-01	3.20000
1947-08-01	3.30000
1947-09-01	3.30000
1947-10-01	3.30000
1947-11-01	3.40000
1947-12-01	2.80000
1948-01-01	2.80000
1948-02-01	2.50000
1948-03-01	4.60000
1948-04-01	7.60000
1948-05-01	5.20000
1948-06-01	4.20000
1948-07-01	4.00000
1948-08-01	3.10000
1948-09-01	3.90000
1948-10-01	3.20000
1948-11-01	2.40000
1948-12-01	2.80000
1949-01-01	2.70000
1949-02-01	1.80000
1949-03-01	2.50000
1949-04-01	3.40000
1949-05-01	3.00000
1949-06-01	2.90000
1949-07-01	2.80000
1949-08-01	2.90000
1949-09-01	2.70000
1949-10-01	3.80000
1949-11-01	3.10000
1949-12-01	3.10000
1950-01-01	2.80000
1950-02-01	2.90000
1950-03-01	4.60000
1950-04-01	3.80000
1950-05-01	4.20000
1950-06-01	4.00000
1950-07-01	4.10000
1950-08-01	3.90000
1950-09-01	3.30000
1950-10-01	3.20000
1950-11-01	2.80000
1950-12-01	2.70000
1951-01-01	3.40000
1951-02-01	3.40000
1951-03-01	4.60000
1951-04-01	3.90000
1951-05-01	3.00000
1951-06-01	3.30000
1951-07-01	3.40000
1951-08-01	3.10000
1951-09-01	3.80000
1951-10-01	3.50000
1951-11-01	2.60000
1951-12-01	2.40000
1952-01-01	3.00000
1952-02-01	3.40000
1952-03-01	4.30000
1952-04-01	4.40000
1952-05-01	4.30000
1952-06-01	3.80000
1952-07-01	3.50000
1952-08-01	4.00000
1952-09-01	4.70000
1952-10-01	3.80000
1952-11-01	3.40000
1952-12-01	3.30000
1953-01-01	3.10000
1953-02-01	3.40000
1953-03-01	3.80000
1953-04-01	4.30000
1953-05-01	4.00000
1953-06-01	3.40000
1953-07-01	3.90000
1953-08-01	3.20000
1953-09-01	3.20000
1953-10-01	3.50000
1953-11-01	2.80000
1953-12-01	2.90000
1954-01-01	2.20000
1954-02-01	2.30000
1954-03-01	2.80000
1954-04-01	3.10000
1954-05-01	3.00000
1954-06-01	2.90000
1954-07-01	3.10000
1954-08-01	3.10000
1954-09-01	3.10000
1954-10-01	2.70000
1954-11-01	2.80000
1954-12-01	3.10000
1955-01-01	2.20000
1955-02-01	2.60000
1955-03-01	3.70000
1955-04-01	3.10000
1955-05-01	3.30000
1955-06-01	3.00000
1955-07-01	2.70000
1955-08-01	2.70000
1955-09-01	2.40000
1955-10-01	2.40000
1955-11-01	2.40000
1955-12-01	2.30000
1956-01-01	2.20000
1956-02-01	2.40000
1956-03-01	3.00000
1956-04-01	2.80000
1956-05-01	3.10000
1956-06-01	2.60000
1956-07-01	2.70000
1956-08-01	2.50000
1956-09-01	2.40000
1956-10-01	2.50000
1956-11-01	2.60000
1956-12-01	2.10000
1957-01-01	2.00000
1957-02-01	2.40000
1957-03-01	2.60000
1957-04-01	3.00000
1957-05-01	2.70000
1957-06-01	3.20000
1957-07-01	2.80000
1957-08-01	2.70000
1957-09-01	3.00000
1957-10-01	3.30000
1957-11-01	2.80000
1957-12-01	2.60000
1958-01-01	2.40000
1958-02-01	2.40000
1958-03-01	2.90000
1958-04-01	3.50000
1958-05-01	3.60000
1958-06-01	3.00000
1958-07-01	3.10000
1958-08-01	3.80000
1958-09-01	3.40000
1958-10-01	3.70000
1958-11-01	3.90000
1958-12-01	3.20000
1959-01-01	3.40000
1959-02-01	3.40000
1959-03-01	5.10000
1959-04-01	5.10000
1959-05-01	4.80000
1959-06-01	4.40000
1959-07-01	4.30000
1959-08-01	3.80000
1959-09-01	4.20000
1959-10-01	4.20000
1959-11-01	3.50000
1959-12-01	3.20000