Year	% of land area
1990	34.868852459016395
1991	34.82622950819672
1992	34.78360655737705
1993	34.74098360655737
1994	34.6983606557377
1995	34.65573770491803
1996	34.613114754098355
1997	34.570491803278685
1998	34.527868852459015
1999	34.485245901639345
2000	34.442622950819676
2001	34.403278688524594
2002	34.363934426229505
2003	34.324590163934424
2004	34.28524590163934
2005	34.24590163934426
2006	34.20655737704918
2007	34.1672131147541
2008	34.12786885245902
2009	34.088524590163935
2010	34.04918032786885
2011	34.04918032786885
2012	34.04918032786885
2013	34.04918032786885
2014	34.04918032786885
2015	34.04918032786885
2016	34.04918032786885
2017	34.04918032786885
2018	34.04918032786885
2019	34.04918032786885
2020	34.04918032786885
2021	34.04918032786885