Year | Lower limit (billion $) | Actual value (billion $) | Upper limit (billion $) | Whether Optimal |
1990 | 41.08 | 11.09 | 54.50 | Insufficient |
1991 | 34.40 | 21.71 | 49.82 | Insufficient |
1992 | 34.45 | 19.44 | 51.87 | Insufficient |
1993 | 39.95 | 21.20 | 60.29 | Insufficient |
1994 | 47.98 | 51.62 | 73.79 | Optimal |
1995 | 61.04 | 73.60 | 96.29 | Optimal |
1996 | 70.38 | 105.03 | 111.32 | Optimal |
1997 | 84.41 | 139.89 | 131.25 | Excess |
1998 | 86.97 | 144.96 | 136.29 | Excess |
1999 | 94.28 | 154.68 | 145.49 | Excess |
2000 | 93.92 | 165.57 | 151.71 | Excess |
2001 | 170.28 | 212.17 | 237.51 | Optimal |
2002 | 180.10 | 286.41 | 256.08 | Excess |
2003 | 205.06 | 403.25 | 294.75 | Excess |
2004 | 255.72 | 609.93 | 362.98 | Excess |
2005 | 304.85 | 818.87 | 433.25 | Excess |
2006 | 352.56 | 1066.34 | 506.72 | Excess |
2007 | 387.11 | 1528.25 | 545.17 | Excess |
2008 | 421.25 | 1946.03 | 643.56 | Excess |
2009 | 475.48 | 2399.15 | 726.36 | Excess |
2010 | 639.83 | 2847.34 | 953.61 | Excess |
2011 | 1417.41 | 3181.15 | 2564.40 | Excess |
2012 | 1522.51 | 3311.59 | 2758.16 | Excess |
2013 | 1840.96 | 3821.32 | 3315.36 | Excess |
2014 | 2646.10 | 3843.02 | 4308.29 | Optimal |
2015 | 2690.51 | 3330.36 | 4874.79 | Optimal |
2016 | 2869.67 | 3010.52 | 5335.97 | Optimal |