Year,Denmark,Canada,Sri Lanka
1972,32.9491010102413,nan,nan
1973,31.2732676151476,nan,nan
1974,32.0732248406381,nan,nan
1975,29.9880986227097,nan,nan
1976,29.7300273316939,nan,nan
1977,30.2289317502919,nan,nan
1978,31.5655461090197,nan,nan
1979,32.3437200703939,nan,nan
1980,33.2590520608378,nan,nan
1981,33.2274451730538,nan,nan
1982,32.5295905061102,nan,nan
1983,34.0696590948282,nan,nan
1984,35.8275556177228,nan,nan
1985,37.251415041963,nan,nan
1986,39.29520344185,nan,nan
1987,38.8571949588082,nan,nan
1988,38.819619276124,nan,nan
1989,38.0061670499174,nan,nan
1990,36.7082569968696,19.6942923158989,21.0187579245705
1991,35.5067191117811,20.4258357047079,20.5258563966214
1992,36.7305605992809,20.6170069428592,20.16774712368
1993,38.5701604209487,19.730348028277,19.7017405142474
1994,38.8181767450067,19.0789573368755,19.0020791456853
1995,38.1463748289353,19.3882790357627,20.3903428116183
1996,38.6951354204642,19.7191550927272,19.0391445175804
1997,37.8655283302537,20.6024953274635,18.5088377484634
1998,38.1817547627176,20.666234999293,17.187367999167
1999,38.3700687159006,20.5919733470117,17.7126178723881
2000,37.8538909899208,20.8617411485603,16.7969110299005
2001,36.8255222237882,20.1601523762926,16.6398559611425
2002,36.2911456075943,19.3246638356621,16.430966852837
2003,36.2178350158913,19.0651145813243,15.1585651984013
2004,37.8539938235166,18.6903132683099,14.8919023493417
2005,39.3222080553541,18.52968507421,15.4790356419772
2006,38.0985324443546,18.5317932825239,16.2256523337008
2007,40.5770178188443,18.6951561172876,15.7741049233686
2008,39.3530306938842,17.6208781924395,14.8561832387826
2009,38.5493966847956,17.6435436387172,14.469526458893
2010,39.0501760317115,16.8961721345029,12.3276099679356
2011,39.7283549528451,16.9254981361992,12.4783946177691
2012,39.9316830870602,16.9203236637378,11.6875492527087
2013,39.7295306701476,16.9526176646696,11.445022773289
2014,41.8748795594501,16.9792224861735,10.9286954830402
2015,38.90354146663,17.8509094964837,12.5770043165448
2016,38.0360359648306,17.8650755134574,13.1558457997857
2017,38.0879168879288,18.0104464036707,12.7301741326834
2018,37.4293825413279,18.5291939067985,12.5063969532096
2019,39.7772359663564,18.2776090385263,11.8842431171785
2020,39.2120703827283,18.9901852083695,8.74304865477373
2021,40.3735518701147,19.862379496288,8.27299656913743
2022,35.787251322537,18.9723038717055,8.22495409689206
2023,36.6991297613195,20.0017383538811,11.1190517645773
2024,nan,20.5369879331996,nan