Java classes for teens in Canada

// PublicArt.java: our own program for this page (Modern Age Coders)
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

public class PublicArt {

    static class Artwork {
        int id;
        String type;
        String status;
        String neighbourhood;
        int year;

        Artwork(String line) {
            String[] f = line.split(",", -1);       // -1 keeps empty fields
            id = Integer.parseInt(f[0]);
            type = f[1];
            status = f[2];
            neighbourhood = f[3];
            year = Integer.parseInt(f[4]);
        }

        boolean stillThere() {
            return status.equals("In place");
        }
    }

    public static void main(String[] args) throws IOException {
        List<String> lines = Files.readAllLines(Paths.get("vancouver-public-art-5col.csv"));
        List<Artwork> art = new ArrayList<>();
        for (int i = 1; i < lines.size(); i++) {         // line 0 is the header
            art.add(new Artwork(lines.get(i)));
        }

        Map<Integer, Integer> byDecade = new TreeMap<>();
        int gone = 0;
        for (Artwork a : art) {
            if (a.stillThere()) {
                int decade = a.year / 10 * 10;
                byDecade.put(decade, byDecade.getOrDefault(decade, 0) + 1);
            } else {
                gone++;
            }
        }

        Artwork oldest = art.stream()
                .filter(Artwork::stillThere)
                .min(Comparator.comparingInt(a -> a.year))
                .get();

        System.out.println("records: " + art.size() + ", not in place: " + gone);
        System.out.println("in place, by decade installed: " + byDecade);
        System.out.println("oldest in place: #" + oldest.id + ", " + oldest.type + ", " + oldest.year);
    }
}

records: 751, not in place: 273
in place, by decade installed: {1900=3, 1910=3, 1920=9, 1930=4, 1940=2, 1950=8, 1960=24, 1970=31, 1980=33, 1990=67, 2000=90, 2010=159, 2020=45}
oldest in place: #284, Totem pole, 1901

Of 751 records, 478 are in place. The decade of the 2010s alone accounts for 159 of those.