| 年份 | 老挝 |
|---|---|
| 2023 | - |
| 2022 | 4.15187 |
| 2021 | 4.12185 |
| 2020 | 4.1019 |
| 2019 | 4.08507 |
| 2018 | 4.05845 |
| 2017 | 4.02407 |
| 2016 | 3.98772 |
| 2015 | 3.94521 |
| 2014 | 3.87682 |
| 2013 | 3.78105 |
| 2012 | 3.67816 |
| 2011 | 3.57674 |
| 2010 | 3.48286 |
| 2009 | 3.39885 |
| 2008 | 3.32144 |
| 2007 | 3.2481 |
| 2006 | 3.17779 |
| 2005 | 3.10834 |
| 2004 | 3.04104 |
| 2003 | 2.98329 |
| 2002 | 2.94085 |
| 2001 | 2.9134 |
| 2000 | 2.89556 |
| 1999 | 2.90234 |
| 1998 | 2.92157 |
| 1997 | 2.92222 |
| 1996 | 2.90545 |
| 1995 | 2.88336 |
| 1994 | 2.87104 |
| 1993 | 2.87199 |
| 1992 | 2.884 |
| 1991 | 2.90153 |
| 1990 | 2.92119 |
| 1989 | 2.94175 |
| 1988 | 2.96086 |
| 1987 | 2.97996 |
| 1986 | 3.00617 |
| 1985 | 3.04305 |
| 1984 | 3.08847 |
| 1983 | 3.14147 |
| 1982 | 3.19934 |
| 1981 | 3.25337 |
| 1980 | 3.29795 |
| 1979 | 3.33343 |
| 1978 | 3.35921 |
| 1977 | 3.37689 |
| 1976 | 3.39386 |
| 1975 | 3.41442 |
| 1974 | 3.43793 |
| 1973 | 3.46321 |
| 1972 | 3.48936 |
| 1971 | 3.5141 |
| 1970 | 3.53638 |
| 1969 | 3.55641 |
| 1968 | 3.57446 |
| 1967 | 3.58952 |
| 1966 | 3.59936 |
| 1965 | 3.60271 |
| 1964 | 3.59954 |
| 1963 | 3.58879 |
| 1962 | 3.57277 |
| 1961 | 3.55888 |
| 1960 | 3.55168 |