Quarter	Millions of US Dollars
1997-10-01	10
1998-01-01	10
1998-04-01	5
1998-07-01	5
2014-04-01	2000
2014-07-01	2020
2014-10-01	2780
2015-01-01	2780
2015-04-01	2790
2015-07-01	2770
2015-10-01	2750
2016-01-01	2750
2016-04-01	2750
2016-07-01	2750
2016-10-01	2750
2017-01-01	2750
2017-04-01	2750
2017-07-01	2750
2017-10-01	2750
2018-01-01	4750
2018-04-01	4750