Tonga GNI Trend
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| 1970 | 17.4M | 1989 | 157M | 2008 | 343M |
| 1971 | 19.7M | 1990 | 166M | 2009 | 330M |
| 1972 | 23.6M | 1991 | 199M | 2010 | 383M |
| 1973 | 35M | 1992 | 195M | 2011 | 452M |
| 1974 | 46.9M | 1993 | 192M | 2012 | 434M |
| 1975 | 43.4M | 1994 | 205M | 2013 | 453M |
| 1976 | 40M | 1995 | 213M | 2014 | 436M |
| 1977 | 45.2M | 1996 | 227M | 2015 | 408M |
| 1978 | 55.5M | 1997 | 220M | 2016 | 428M |
| 1979 | 60.3M | 1998 | 199M | 2017 | 479M |
| 1980 | 82.3M | 1999 | 204M | 2018 | 507M |
| 1981 | 87M | 2000 | 193M | 2019 | 535M |
| 1982 | 91.1M | 2001 | 168M | 2020 | 545M |
| 1983 | 89.6M | 2002 | 185M | 2021 | 549M |
| 1984 | 88.3M | 2003 | 208M | 2022 | 568M |
| 1985 | 76.4M | 2004 | 242M | 2023 | 636M |
| 1986 | 92.4M | 2005 | 261M | 2024 | 694M |
| 1987 | 110M | 2006 | 295M | ||
| 1988 | 155M | 2007 | 308M |
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