Year	Land use	Water use	Tropospheric ozone precursor emissions	Material use	Acidifying air pollutant emissions	GHG emissions
1995	52.8	33.9	16.3	24.2	11.3	13.1
1996	51.6	32.7	16.1	23.9	10.9	11.8
1997	47.8	28.6	14.5	22.8	9.6	10.6
1998	50.0	32.0	20.1	25.0	13.7	14.3
1999	51.1	33.5	24.0	26.4	16.0	17.0
2000	51.4	34.0	26.6	27.8	17.2	18.0
2001	53.2	35.5	24.8	28.3	17.6	16.8
2002	53.3	36.0	27.3	28.1	18.0	16.7
2003	55.3	40.8	29.2	31.2	20.2	19.0
2004	55.9	39.2	30.2	31.3	21.2	20.2
2005	54.7	42.0	33.1	31.4	21.8	20.6
2006	55.0	43.0	33.0	32.0	24.0	21.0
2007	56.0	46.0	44.0	32.0	27.0	23.0
2008	55.0	43.0	43.0	33.0	30.0	24.0