Month	Thousand Units
1959-01-01	16.8000
1959-02-01	16.4000
1959-03-01	20.3000
1959-04-01	22.6000
1959-05-01	23.0000
1959-06-01	21.5000
1959-07-01	19.7000
1959-08-01	18.8000
1959-09-01	18.8000
1959-10-01	18.6000
1959-11-01	15.4000
1959-12-01	15.1000
1960-01-01	14.3000
1960-02-01	15.4000
1960-03-01	13.7000
1960-04-01	18.0000
1960-05-01	21.9000
1960-06-01	17.9000
1960-07-01	18.1000
1960-08-01	20.9000
1960-09-01	17.2000
1960-10-01	20.9000
1960-11-01	20.2000
1960-12-01	15.1000
1961-01-01	17.2000
1961-02-01	15.6000
1961-03-01	23.0000
1961-04-01	23.6000
1961-05-01	25.3000
1961-06-01	28.7000
1961-07-01	25.8000
1961-08-01	29.5000
1961-09-01	28.5000
1961-10-01	27.9000
1961-11-01	25.0000
1961-12-01	24.5000
1962-01-01	23.9000
1962-02-01	21.3000
1962-03-01	31.8000
1962-04-01	41.2000
1962-05-01	42.1000
1962-06-01	36.9000
1962-07-01	37.3000
1962-08-01	41.8000
1962-09-01	34.7000
1962-10-01	39.1000
1962-11-01	38.5000
1962-12-01	33.8000
1963-01-01	31.1000
1963-02-01	32.4000
1963-03-01	40.5000
1963-04-01	48.5000
1963-05-01	54.6000
1963-06-01	47.9000
1963-07-01	47.5000
1963-08-01	43.8000
1963-09-01	48.0000
1963-10-01	55.2000
1963-11-01	44.1000
1963-12-01	41.7000