What is the population of the country to which  the Croatian road A9 leads ?
Slovenia Slovenia ( ; Slovene: "Slovenija" ] ), officially the Republic of Slovenia (Slovene:    , abbr.: "RS"), is a nation state located in the southern Central Europe, variously classified as part of Eastern and Southern Europe. The country is located at the crossroads of main European cultural and trade routes. It is bordered by Italy to the west, Austria to the north, Hungary to the northeast, Croatia to the south and southeast, and the Adriatic Sea to the southwest. It covers 20,273 km2 and has a population of 2.06 million. It is a parliamentary republic and a member of the United Nations, European Union, and NATO. The capital and largest city is Ljubljana.
D21 road (Croatia) D21 is a 80.1 km , north–south state road in Istria County, Croatia. A short section of D21 is a part of the European route E751. The northern terminus of the route is located at the Croatia–Slovenia border at the Dragonja River. There it connects to Koper, Slovenia, and Trieste, Italy, via the Slovene route G11 further north. D21 route is generally parallel to A9 motorway. The two form several junctions, either directly or via short connectors, at Buje, Bale and Vodnjan – towns served directly by D21. The southern terminus of the route is found in the city of Pula, at the southern tip of the Istrian Peninsula.