Nitrogen use efficiency in American Samoa
American Samoa: Nitrogen use efficiency was 62.1% in 2014. ▲ Rising
Nitrogen use efficiency in American Samoa, 1961–2014
Source: Lassaletta et al. (2014) – processed by Our World in Data. Measured in %.
Analysis
The most recent figure for nitrogen use efficiency in American Samoa is 62.1%, measured in 2014. That is the highest value across all 54 years on record.
The figure is up 23.8% on the previous year and up 54.9% over ten years.
Over the whole period, nitrogen use efficiency in American Samoa peaked at 62.1% in 2014 and was at its lowest, 19.4%, in 1989.
That places American Samoa 67th out of 205 countries with data for 2014, putting it in the middle of the range.
The long-run direction has been consistently rising across the 54 years of available data.
Nitrogen use efficiency in American Samoa, year by year
| Year | % | Change |
|---|---|---|
| 1961 | 34.9% | — |
| 1962 | 40.7% | +16.6% |
| 1963 | 36.6% | -10.1% |
| 1964 | 26.7% | -27.2% |
| 1965 | 23.3% | -12.8% |
| 1966 | 26.0% | +11.8% |
| 1967 | 33.7% | +29.5% |
| 1968 | 35.6% | +5.9% |
| 1969 | 36.1% | +1.2% |
| 1970 | 33.2% | -7.9% |
| 1971 | 32.3% | -2.6% |
| 1972 | 31.5% | -2.4% |
| 1973 | 31.3% | -0.7% |
| 1974 | 30.3% | -3.2% |
| 1975 | 30.1% | -0.7% |
| 1976 | 29.5% | -2.1% |
| 1977 | 28.8% | -2.2% |
| 1978 | 27.7% | -3.7% |
| 1979 | 23.4% | -15.8% |
| 1980 | 26.2% | +12.1% |
| 1981 | 25.7% | -2.0% |
| 1982 | 25.0% | -2.5% |
| 1983 | 24.1% | -3.8% |
| 1984 | 22.3% | -7.2% |
| 1985 | 21.1% | -5.6% |
| 1986 | 21.4% | +1.4% |
| 1987 | 19.6% | -8.1% |
| 1988 | 19.5% | -0.4% |
| 1989 | 19.4% | -0.7% |
| 1990 | 24.4% | +25.6% |
| 1991 | 23.5% | -3.4% |
| 1992 | 23.8% | +1.0% |
| 1993 | 26.4% | +11.0% |
| 1994 | 28.0% | +6.1% |
| 1995 | 28.8% | +3.0% |
| 1996 | 29.8% | +3.2% |
| 1997 | 31.1% | +4.6% |
| 1998 | 40.3% | +29.3% |
| 1999 | 28.8% | -28.6% |
| 2000 | 32.2% | +11.8% |
| 2001 | 36.5% | +13.7% |
| 2002 | 38.2% | +4.6% |
| 2003 | 40.9% | +6.9% |
| 2004 | 40.1% | -2.0% |
| 2005 | 42.9% | +7.2% |
| 2006 | 43.6% | +1.6% |
| 2007 | 44.9% | +3.0% |
| 2008 | 45.9% | +2.1% |
| 2009 | 47.2% | +2.9% |
| 2010 | 47.5% | +0.5% |
| 2011 | 47.5% | -0.0% |
| 2012 | 46.2% | -2.7% |
| 2013 | 50.1% | +8.5% |
| 2014 | 62.1% | +23.8% |
American Samoa compared with similar countries
- American Samoa's 62.1% is above the median for high income countries, which is 36.0%, 1.7× the median. (69 countries reporting)
- American Samoa's 62.1% is above the median for East Asia & Pacific, which is 44.5%, 1.4× the median. (32 countries reporting)
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1960s | 32.6% | 23.3% | 40.7% | 9 |
| 1970s | 29.8% | 23.4% | 33.2% | 10 |
| 1980s | 22.4% | 19.4% | 26.2% | 10 |
| 1990s | 28.5% | 23.5% | 40.3% | 10 |
| 2000s | 41.3% | 32.2% | 47.2% | 10 |
| 2010s | 50.7% | 46.2% | 62.1% | 5 |
Countries ranked near American Samoa
More reference data data for American Samoa
- Emission Totals - Emissions (N2O) - IPCC Agriculture 0 (2050)
- Emission Totals - Emissions (CO2eq) (AR5) - Burning - Crop residues 0.0023 (2050)
- Emission Totals - Emissions (CO2eq) (AR5) - IPCC Agriculture 0.0023 (2050)
- Emission Totals - Emissions (CO2eq) from CH4 (AR5) - Burning - Crop 0.0018 (2050)
- Emission Totals - Emissions (CO2eq) from CH4 (AR5) - IPCC Agriculture 0.0018 (2050)
- Emission Totals - Emissions (CH4) - Burning - Crop residues 0.0001 (2050)
- Emission Totals - Emissions (CH4) - IPCC Agriculture 0.0001 (2050)
- Emission Totals - Emissions (CO2eq) from N2O (AR5) - Burning - Crop 0.0005 (2050)
- Emission Totals - Emissions (CO2eq) from N2O (AR5) - IPCC Agriculture 0.0005 (2050)
- Emission Totals - Emissions (N2O) - Burning - Crop residues 0 (2050)
Frequently asked questions
- What is nitrogen use efficiency in American Samoa?
- Nitrogen use efficiency in American Samoa was 62.1% in 2014, according to Lassaletta et al. (2014) – processed by Our World in Data.
- What is the highest nitrogen use efficiency recorded in American Samoa?
- The highest recorded value was 62.1% in 2014.
- What is the lowest nitrogen use efficiency recorded in American Samoa?
- The lowest recorded value was 19.4% in 1989.
- How does American Samoa rank for nitrogen use efficiency?
- American Samoa ranks 67th out of 205 countries with data for 2014.
- Is nitrogen use efficiency rising or falling in American Samoa?
- Over the last ten years it is up 54.9%. The long-run trend across the full record is rising.
- Where does this American Samoa data come from?
- The figures come from Lassaletta et al. (2014) – processed by Our World in Data, published as part of Nitrogen use efficiency. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 54 observations, free to reuse under CC BY 4.0 (Our World in Data).
About this data
Nitrogen use efficiency (NUE) is the ratio between nitrogen inputs and output. A NUE of 40% means that only 40% of nitrogen inputs are converted into nitrogen in the form of crops.