| Year | Import and export volume (million ton) | Virtual water (v.w) trade of rice (×108 m3) | ||||
| Import | Export | Net-import | v.w import | v.w export | Net-v.w import | |
| 1990 | 6.3 | 32.6 | −26.7 | 0.63 | 3.33 | −2.7 |
| 1991 | 142.7 | 68.9 | 73.8 | 14.46 | 6.98 | 7.48 |
| 1992 | 103.6 | 95.3 | 8.3 | 10.50 | 9.66 | 0.84 |
| 1993 | 9.6 | 142 | −132.4 | 0.97 | 14.39 | −13.42 |
| 1994 | 51.2 | 144.8 | −93.6 | 5.19 | 14.68 | −9.49 |
| 1995 | 164 | 4.6 | 159.4 | 16.62 | 0.46 | 16.16 |
| 1996 | 76 | 25.4 | 50.6 | 7.70 | 2.57 | 5.13 |
| 1997 | 32.6 | 93.2 | −60.6 | 3.30 | 9.44 | −6.14 |
| 1998 | 24.4 | 372.6 | −348.2 | 24.74 | 60.04 | −35.3 |
| 1999 | 16.8 | 269.1 | −252.3 | 1.70 | 27.28 | −25.58 |
| 2000 | 23.9 | 293.4 | −269.5 | 2.42 | 29.74 | −27.32 |
| 2001 | 26.9 | 184.8 | −157.9 | 2.72 | 18.73 | −16.01 |
| 2002 | 23.6 | 196.4 | −172.8 | 2.39 | 19.91 | −17.52 |
| 2003 | 25.7 | 258.5 | −232.8 | 2.60 | 26.20 | −23.6 |
| 2004 | 75.6 | 88.1 | −12.5 | 7.66 | 8.92 | −1.26 |
| 2005 | 51.4 | 65.7 | −14.3 | 5.21 | 6.66 | −1.45 |
| 2006 | 71.8 | 121.8 | −50 | 7.28 | 12.35 | −5.07 |
| 2007 | 47.1 | 130.3 | −83.2 | 4.77 | 13.20 | −8.43 |
| 2012 | 29.3 | 94.7 | −65.4 | 2.97 | 9.60 | −6.63 |
| 2009 | 33.3 | 76.2 | −42.9 | 3.37 | 7.72 | −4.35 |
| 2010 | 38.3 | 62.2 | −23.9 | 3.88 | 6.30 | −2.42 |
| 2011 | 59.8 | 51.6 | 8.2 | 6.06 | 5.23 | 0.83 |
| 2012 | 236.9 | 25.7 | 211.2 | 2.40 | 2.60 | −0.20 |
| Total | 1370.8 | 2897.9 | −1527.5 | 139.54 | 235.99 | −176.45 |